diff --git a/BUILD.gn b/BUILD.gn
index 9b8fdf7..ce3bded 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -630,6 +630,7 @@
     "core/src/fxge/ge/fx_ge_device.cpp",
     "core/src/fxge/ge/fx_ge_font.cpp",
     "core/src/fxge/ge/fx_ge_fontmap.cpp",
+    "core/src/fxge/ge/fx_ge_linux.cpp",
     "core/src/fxge/ge/fx_ge_path.cpp",
     "core/src/fxge/ge/fx_ge_ps.cpp",
     "core/src/fxge/ge/fx_ge_text.cpp",
diff --git a/core/src/fxge/ge/fx_ge_linux.cpp b/core/src/fxge/ge/fx_ge_linux.cpp
new file mode 100644
index 0000000..ad0a70a
--- /dev/null
+++ b/core/src/fxge/ge/fx_ge_linux.cpp
@@ -0,0 +1,234 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+ 
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "../../../include/fxge/fx_ge.h"
+#include "../agg/include/fx_agg_driver.h"
+#include "text_int.h"
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_
+static const struct {
+    FX_LPCSTR	m_pName;
+    FX_LPCSTR	m_pSubstName;
+}
+Base14Substs[] = {
+    {"Courier", "Courier New"},
+    {"Courier-Bold", "Courier New Bold"},
+    {"Courier-BoldOblique", "Courier New Bold Italic"},
+    {"Courier-Oblique", "Courier New Italic"},
+    {"Helvetica", "Arial"},
+    {"Helvetica-Bold", "Arial Bold"},
+    {"Helvetica-BoldOblique", "Arial Bold Italic"},
+    {"Helvetica-Oblique", "Arial Italic"},
+    {"Times-Roman", "Times New Roman"},
+    {"Times-Bold", "Times New Roman Bold"},
+    {"Times-BoldItalic", "Times New Roman Bold Italic"},
+    {"Times-Italic", "Times New Roman Italic"},
+};
+class CFX_LinuxFontInfo : public CFX_FolderFontInfo
+{
+public:
+    virtual void*		MapFont(int weight, FX_BOOL bItalic, int charset, int pitch_family, FX_LPCSTR family, FX_BOOL& bExact);
+    FX_BOOL				ParseFontCfg();
+    void*				FindFont(int weight, FX_BOOL bItalic, int charset, int pitch_family, FX_LPCSTR family, FX_BOOL bMatchName);
+};
+#define LINUX_GPNAMESIZE	6
+static const struct {
+    FX_LPCSTR NameArr[LINUX_GPNAMESIZE];
+}
+LinuxGpFontList[] = {
+    {{"TakaoPGothic", "VL PGothic", "IPAPGothic", "VL Gothic", "Kochi Gothic", "VL Gothic regular"}},
+    {{"TakaoGothic", "VL Gothic", "IPAGothic", "Kochi Gothic", NULL, "VL Gothic regular"}},
+    {{"TakaoPMincho", "IPAPMincho", "VL Gothic", "Kochi Mincho", NULL, "VL Gothic regular"}},
+    {{"TakaoMincho", "IPAMincho", "VL Gothic", "Kochi Mincho", NULL, "VL Gothic regular"}},
+};
+static const FX_LPCSTR g_LinuxGbFontList[] = {
+    "AR PL UMing CN Light",
+    "WenQuanYi Micro Hei",
+    "AR PL UKai CN",
+};
+static const FX_LPCSTR g_LinuxB5FontList[] = {
+    "AR PL UMing TW Light",
+    "WenQuanYi Micro Hei",
+    "AR PL UKai TW",
+};
+static const FX_LPCSTR g_LinuxHGFontList[] = {
+    "UnDotum",
+};
+static FX_INT32 GetJapanesePreference(FX_LPCSTR facearr, int weight, int picth_family)
+{
+    CFX_ByteString face = facearr;
+    if (face.Find("Gothic") >= 0 || face.Find("\x83\x53\x83\x56\x83\x62\x83\x4e") >= 0) {
+        if (face.Find("PGothic") >= 0 || face.Find("\x82\x6f\x83\x53\x83\x56\x83\x62\x83\x4e") >= 0) {
+            return 0;
+        } else {
+            return 1;
+        }
+    } else if (face.Find("Mincho") >= 0 || face.Find("\x96\xbe\x92\xa9") >= 0) {
+        if (face.Find("PMincho") >= 0 || face.Find("\x82\x6f\x96\xbe\x92\xa9") >= 0) {
+            return 2;
+        } else {
+            return 3;
+        }
+    }
+    if (!(picth_family & FXFONT_FF_ROMAN) && weight > 400) {
+        return 0;
+    }
+    return 2;
+}
+void* CFX_LinuxFontInfo::MapFont(int weight, FX_BOOL bItalic, int charset, int pitch_family, FX_LPCSTR cstr_face, FX_BOOL& bExact)
+{
+    CFX_ByteString face = cstr_face;
+    int iBaseFont;
+    for (iBaseFont = 0; iBaseFont < 12; iBaseFont ++)
+        if (face == CFX_ByteStringC(Base14Substs[iBaseFont].m_pName)) {
+            face = Base14Substs[iBaseFont].m_pSubstName;
+            bExact = TRUE;
+            break;
+        }
+    if (iBaseFont < 12) {
+        return GetFont(face);
+    }
+    FX_LPVOID p = NULL;
+    FX_BOOL bCJK = TRUE;
+    switch (charset) {
+        case FXFONT_SHIFTJIS_CHARSET: {
+                FX_INT32 index = GetJapanesePreference(cstr_face, weight, pitch_family);
+                if (index < 0) {
+                    break;
+                }
+                for (FX_INT32 i = 0; i < LINUX_GPNAMESIZE; i++)
+                    if (m_FontList.Lookup(LinuxGpFontList[index].NameArr[i], p)) {
+                        return p;
+                    }
+            }
+            break;
+        case FXFONT_GB2312_CHARSET: {
+                static FX_INT32 s_gbCount = sizeof(g_LinuxGbFontList) / sizeof(FX_LPCSTR);
+                for (FX_INT32 i = 0; i < s_gbCount; i++)
+                    if (m_FontList.Lookup(g_LinuxGbFontList[i], p)) {
+                        return p;
+                    }
+            }
+            break;
+        case FXFONT_CHINESEBIG5_CHARSET: {
+                static FX_INT32 s_b5Count = sizeof(g_LinuxB5FontList) / sizeof(FX_LPCSTR);
+                for (FX_INT32 i = 0; i < s_b5Count; i++)
+                    if (m_FontList.Lookup(g_LinuxB5FontList[i], p)) {
+                        return p;
+                    }
+            }
+            break;
+        case FXFONT_HANGEUL_CHARSET: {
+                static FX_INT32 s_hgCount = sizeof(g_LinuxHGFontList) / sizeof(FX_LPCSTR);
+                for (FX_INT32 i = 0; i < s_hgCount; i++)
+                    if (m_FontList.Lookup(g_LinuxHGFontList[i], p)) {
+                        return p;
+                    }
+            }
+            break;
+        default:
+            bCJK = FALSE;
+            break;
+    }
+    if (charset == FXFONT_ANSI_CHARSET && (pitch_family & FXFONT_FF_FIXEDPITCH)) {
+        return GetFont("Courier New");
+    }
+    return FindFont(weight, bItalic, charset, pitch_family, cstr_face, !bCJK);
+}
+static FX_DWORD _LinuxGetCharset(int charset)
+{
+    switch(charset) {
+        case FXFONT_SHIFTJIS_CHARSET:
+            return CHARSET_FLAG_SHIFTJIS;
+        case FXFONT_GB2312_CHARSET:
+            return CHARSET_FLAG_GB;
+        case FXFONT_CHINESEBIG5_CHARSET:
+            return CHARSET_FLAG_BIG5;
+        case FXFONT_HANGEUL_CHARSET:
+            return CHARSET_FLAG_KOREAN;
+        case FXFONT_SYMBOL_CHARSET:
+            return CHARSET_FLAG_SYMBOL;
+        case FXFONT_ANSI_CHARSET:
+            return CHARSET_FLAG_ANSI;
+        default:
+            break;
+    }
+    return 0;
+}
+static FX_INT32 _LinuxGetSimilarValue(int weight, FX_BOOL bItalic, int pitch_family, FX_DWORD style)
+{
+    FX_INT32 iSimilarValue = 0;
+    if ((style & FXFONT_BOLD) == (weight > 400)) {
+        iSimilarValue += 16;
+    }
+    if ((style & FXFONT_ITALIC) == bItalic) {
+        iSimilarValue += 16;
+    }
+    if ((style & FXFONT_SERIF) == (pitch_family & FXFONT_FF_ROMAN)) {
+        iSimilarValue += 16;
+    }
+    if ((style & FXFONT_SCRIPT) == (pitch_family & FXFONT_FF_SCRIPT)) {
+        iSimilarValue += 8;
+    }
+    if ((style & FXFONT_FIXED_PITCH) == (pitch_family & FXFONT_FF_FIXEDPITCH)) {
+        iSimilarValue += 8;
+    }
+    return iSimilarValue;
+}
+void* CFX_LinuxFontInfo::FindFont(int weight, FX_BOOL bItalic, int charset, int pitch_family, FX_LPCSTR family, FX_BOOL bMatchName)
+{
+    CFontFaceInfo* pFind = NULL;
+    FX_DWORD charset_flag = _LinuxGetCharset(charset);
+    FX_INT32 iBestSimilar = 0;
+    FX_POSITION pos = m_FontList.GetStartPosition();
+    while (pos) {
+        CFX_ByteString bsName;
+        CFontFaceInfo* pFont = NULL;
+        m_FontList.GetNextAssoc(pos, bsName, (FX_LPVOID&)pFont);
+        if (!(pFont->m_Charsets & charset_flag) && charset != FXFONT_DEFAULT_CHARSET) {
+            continue;
+        }
+        FX_INT32 iSimilarValue = 0;
+        FX_INT32 index = bsName.Find(family);
+        if (bMatchName && index < 0) {
+            continue;
+        }
+        if (!bMatchName && index > 0) {
+            iSimilarValue += 64;
+        }
+        iSimilarValue = _LinuxGetSimilarValue(weight, bItalic, pitch_family, pFont->m_Styles);
+        if (iSimilarValue > iBestSimilar) {
+            iBestSimilar = iSimilarValue;
+            pFind = pFont;
+        }
+    }
+    return pFind;
+}
+IFX_SystemFontInfo* IFX_SystemFontInfo::CreateDefault()
+{
+    CFX_LinuxFontInfo* pInfo = FX_NEW CFX_LinuxFontInfo;
+    if (!pInfo) {
+        return NULL;
+    }
+    if (!pInfo->ParseFontCfg()) {
+        pInfo->AddPath("/usr/share/fonts");
+        pInfo->AddPath("/usr/share/X11/fonts/Type1");
+        pInfo->AddPath("/usr/share/X11/fonts/TTF");
+        pInfo->AddPath("/usr/local/share/fonts");
+    }
+    return pInfo;
+}
+FX_BOOL CFX_LinuxFontInfo::ParseFontCfg()
+{
+    return FALSE;
+}
+void CFX_GEModule::InitPlatform()
+{
+    m_pFontMgr->SetSystemFontInfo(IFX_SystemFontInfo::CreateDefault());
+}
+void CFX_GEModule::DestroyPlatform()
+{
+}
+#endif
diff --git a/pdfium.gyp b/pdfium.gyp
index 6b4b8bc..cc28ada 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -644,6 +644,7 @@
         'core/src/fxge/ge/fx_ge_device.cpp',
         'core/src/fxge/ge/fx_ge_font.cpp',
         'core/src/fxge/ge/fx_ge_fontmap.cpp',
+        'core/src/fxge/ge/fx_ge_linux.cpp',
         'core/src/fxge/ge/fx_ge_path.cpp',
         'core/src/fxge/ge/fx_ge_ps.cpp',
         'core/src/fxge/ge/fx_ge_text.cpp',
diff --git a/third_party/bigint/BigInteger.cc b/third_party/bigint/BigInteger.cc
index bac578f..93b57e4 100644
--- a/third_party/bigint/BigInteger.cc
+++ b/third_party/bigint/BigInteger.cc
@@ -20,11 +20,7 @@
 	switch (s) {
 	case zero:
 		if (!mag.isZero())
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigInteger::BigInteger(const Blk *, Index, Sign): Cannot use a sign of zero with a nonzero magnitude";
-#endif
 		sign = zero;
 		break;
 	case positive:
@@ -35,11 +31,7 @@
 	default:
 		/* g++ seems to be optimizing out this case on the assumption
 		 * that the sign is a valid member of the enumeration.  Oh well. */
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigInteger::BigInteger(const Blk *, Index, Sign): Invalid sign";
-#endif
 	}
 }
 
@@ -47,11 +39,7 @@
 	switch (s) {
 	case zero:
 		if (!mag.isZero())
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigInteger::BigInteger(const BigUnsigned &, Sign): Cannot use a sign of zero with a nonzero magnitude";
-#endif
 		sign = zero;
 		break;
 	case positive:
@@ -62,11 +50,7 @@
 	default:
 		/* g++ seems to be optimizing out this case on the assumption
 		 * that the sign is a valid member of the enumeration.  Oh well. */
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigInteger::BigInteger(const BigUnsigned &, Sign): Invalid sign";
-#endif
 	}
 }
 
@@ -114,12 +98,7 @@
 template <class X>
 X BigInteger::convertToUnsignedPrimitive() const {
 	if (sign == negative)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigInteger::to<Primitive>: "
-			"Cannot convert a negative integer to an unsigned type";
-#endif
 	else
 		return convertBigUnsignedToPrimitiveAccess<X>(mag);
 }
@@ -146,12 +125,7 @@
 		}
 		// Otherwise fall through.
 	}
-#ifdef FOXIT_CHROME_BUILD
     abort();
-#else
-	throw "BigInteger::to<Primitive>: "
-		"Value is too big to fit in the requested type";
-#endif
 }
 
 unsigned long  BigInteger::toUnsignedLong () const { return convertToUnsignedPrimitive<unsigned long >       (); }
@@ -179,11 +153,7 @@
 		// Compare the magnitudes, but return the opposite result
 		return CmpRes(-mag.compareTo(x.mag));
 	default:
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigInteger internal error";
-#endif
 	}
 }
 
@@ -315,11 +285,7 @@
 	// Defend against aliased calls;
 	// same idea as in BigUnsigned::divideWithRemainder .
 	if (this == &q)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigInteger::divideWithRemainder: Cannot write quotient and remainder into the same variable";
-#endif
 	if (this == &b || &q == &b) {
 		BigInteger tmpB(b);
 		divideWithRemainder(tmpB, q);
diff --git a/third_party/bigint/BigInteger.hh b/third_party/bigint/BigInteger.hh
index a239d3c..320a22f 100644
--- a/third_party/bigint/BigInteger.hh
+++ b/third_party/bigint/BigInteger.hh
@@ -164,11 +164,7 @@
 }
 inline BigInteger BigInteger::operator /(const BigInteger &x) const {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigInteger::operator /: division by zero";
-#endif
 	BigInteger q, r;
 	r = *this;
 	r.divideWithRemainder(x, q);
@@ -176,11 +172,7 @@
 }
 inline BigInteger BigInteger::operator %(const BigInteger &x) const {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigInteger::operator %: division by zero";
-#endif
 	BigInteger q, r;
 	r = *this;
 	r.divideWithRemainder(x, q);
@@ -210,11 +202,7 @@
 }
 inline void BigInteger::operator /=(const BigInteger &x) {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigInteger::operator /=: division by zero";
-#endif
 	/* The following technique is slightly faster than copying *this first
 	 * when x is large. */
 	BigInteger q;
@@ -224,11 +212,7 @@
 }
 inline void BigInteger::operator %=(const BigInteger &x) {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigInteger::operator %=: division by zero";
-#endif
 	BigInteger q;
 	// Mods *this by x.  Don't care about quotient left in q.
 	divideWithRemainder(x, q);
diff --git a/third_party/bigint/BigIntegerUtils.cc b/third_party/bigint/BigIntegerUtils.cc
index fac8ac3..f48334d 100644
--- a/third_party/bigint/BigIntegerUtils.cc
+++ b/third_party/bigint/BigIntegerUtils.cc
@@ -42,11 +42,8 @@
 		if (osFlags & os.showbase)
 			os << '0';
 	} else
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "std::ostream << BigUnsigned: Could not determine the desired base from output-stream flags";
-#endif
+
 	std::string s = std::string(BigUnsignedInABase(x, base));
 	os << s;
 	return os;
diff --git a/third_party/bigint/BigUnsigned.cc b/third_party/bigint/BigUnsigned.cc
index 863fadc..e38e4aa 100644
--- a/third_party/bigint/BigUnsigned.cc
+++ b/third_party/bigint/BigUnsigned.cc
@@ -195,12 +195,7 @@
 		return;
 	} else if (a.len < b.len)
 		// If a is shorter than b, the result is negative.
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsigned::subtract: "
-			"Negative result in unsigned calculation";
-#endif
 	// Some variables...
 	bool borrowIn, borrowOut;
 	Blk temp;
@@ -233,11 +228,7 @@
 	 * predictable state. */
 	if (borrowIn) {
 		len = 0;
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsigned::subtract: Negative result in unsigned calculation";
-#endif
 	} else
 		// Copy over the rest of the blocks
 		for (; i < a.len; i++)
@@ -400,11 +391,7 @@
 	 * It would be silly to try to write quotient and remainder to the
 	 * same variable.  Rule that out right away. */
 	if (this == &q)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsigned::divideWithRemainder: Cannot write quotient and remainder into the same variable";
-#endif
 	/* Now *this and q are separate, so the only concern is that b might be
 	 * aliased to one of them.  If so, use a temporary copy of b. */
 	if (this == &b || &q == &b) {
@@ -614,12 +601,7 @@
 	DTRT_ALIASED(this == &a, bitShiftLeft(a, b));
 	if (b < 0) {
 		if (b << 1 == 0)
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigUnsigned::bitShiftLeft: "
-				"Pathological shift amount not implemented";
-#endif
 		else {
 			bitShiftRight(a, -b);
 			return;
@@ -644,12 +626,7 @@
 	DTRT_ALIASED(this == &a, bitShiftRight(a, b));
 	if (b < 0) {
 		if (b << 1 == 0)
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigUnsigned::bitShiftRight: "
-				"Pathological shift amount not implemented";
-#endif
 		else {
 			bitShiftLeft(a, -b);
 			return;
@@ -705,11 +682,7 @@
 // Prefix decrement
 void BigUnsigned::operator --() {
 	if (len == 0)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsigned::operator --(): Cannot decrement an unsigned zero";
-#endif
 	Index i;
 	bool borrow = true;
 	for (i = 0; borrow; i++) {
diff --git a/third_party/bigint/BigUnsigned.hh b/third_party/bigint/BigUnsigned.hh
index accd4d6..de4c18e 100644
--- a/third_party/bigint/BigUnsigned.hh
+++ b/third_party/bigint/BigUnsigned.hh
@@ -267,11 +267,7 @@
 }
 inline BigUnsigned BigUnsigned::operator /(const BigUnsigned &x) const {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigUnsigned::operator /: division by zero";
-#endif
 	BigUnsigned q, r;
 	r = *this;
 	r.divideWithRemainder(x, q);
@@ -279,11 +275,7 @@
 }
 inline BigUnsigned BigUnsigned::operator %(const BigUnsigned &x) const {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigUnsigned::operator %: division by zero";
-#endif
 	BigUnsigned q, r;
 	r = *this;
 	r.divideWithRemainder(x, q);
@@ -326,11 +318,7 @@
 }
 inline void BigUnsigned::operator /=(const BigUnsigned &x) {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigUnsigned::operator /=: division by zero";
-#endif
 	/* The following technique is slightly faster than copying *this first
 	 * when x is large. */
 	BigUnsigned q;
@@ -340,11 +328,7 @@
 }
 inline void BigUnsigned::operator %=(const BigUnsigned &x) {
 	if (x.isZero())
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-        throw "BigUnsigned::operator %=: division by zero";
-#endif
 	BigUnsigned q;
 	// Mods *this by x.  Don't care about quotient left in q.
 	divideWithRemainder(x, q);
@@ -398,12 +382,7 @@
 template <class X>
 void BigUnsigned::initFromSignedPrimitive(X x) {
 	if (x < 0)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsigned constructor: "
-			"Cannot construct a BigUnsigned from a negative number";
-#endif
 	else
 		initFromPrimitive(x);
 }
@@ -427,12 +406,7 @@
 			return x;
 		// Otherwise fall through.
 	}
-#ifdef FOXIT_CHROME_BUILD
     abort();
-#else
-	throw "BigUnsigned::to<Primitive>: "
-		"Value is too big to fit in the requested type";
-#endif
 }
 
 /* Wrap the above in an x >= 0 test to make sure we got a nonnegative result,
@@ -445,12 +419,7 @@
 	if (x >= 0)
 		return x;
 	else
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsigned::to(Primitive): "
-			"Value is too big to fit in the requested type";
-#endif
 }
 
 #endif
diff --git a/third_party/bigint/BigUnsignedInABase.cc b/third_party/bigint/BigUnsignedInABase.cc
index a24042d..72fe256 100644
--- a/third_party/bigint/BigUnsignedInABase.cc
+++ b/third_party/bigint/BigUnsignedInABase.cc
@@ -10,20 +10,12 @@
 	: NumberlikeArray<Digit>(d, l), base(base) {
 	// Check the base
 	if (base < 2)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsignedInABase::BigUnsignedInABase(const Digit *, Index, Base): The base must be at least 2";
-#endif
 
 	// Validate the digits.
 	for (Index i = 0; i < l; i++)
 		if (blk[i] >= base)
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigUnsignedInABase::BigUnsignedInABase(const Digit *, Index, Base): A digit is too large for the specified base";
-#endif
 
 	// Eliminate any leading zeros we may have been passed.
 	zapLeadingZeros();
@@ -46,11 +38,7 @@
 BigUnsignedInABase::BigUnsignedInABase(const BigUnsigned &x, Base base) {
 	// Check the base
 	if (base < 2)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsignedInABase(BigUnsigned, Base): The base must be at least 2";
-#endif
 	this->base = base;
 
 	// Get an upper bound on how much space we need
@@ -91,11 +79,7 @@
 BigUnsignedInABase::BigUnsignedInABase(const std::string &s, Base base) {
 	// Check the base.
 	if (base > 36)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsignedInABase(std::string, Base): The default string conversion routines use the symbol set 0-9, A-Z and therefore support only up to base 36.  You tried a conversion with a base over 36; write your own string conversion routine.";
-#endif
 	// Save the base.
 	// This pattern is seldom seen in C++, but the analogous ``this.'' is common in Java.
 	this->base = base;
@@ -116,29 +100,17 @@
 		else if (theSymbol >= 'a' && theSymbol <= 'z')
 			blk[digitNum] = theSymbol - 'a' + 10;
 		else
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigUnsignedInABase(std::string, Base): Bad symbol in input.  Only 0-9, A-Z, a-z are accepted.";
-#endif
 
 		if (blk[digitNum] >= base)
-#ifdef FOXIT_CHROME_BUILD
             abort();
-#else
-			throw "BigUnsignedInABase::BigUnsignedInABase(const Digit *, Index, Base): A digit is too large for the specified base";
-#endif
 	}
 	zapLeadingZeros();
 }
 
 BigUnsignedInABase::operator std::string() const {
 	if (base > 36)
-#ifdef FOXIT_CHROME_BUILD
         abort();
-#else
-		throw "BigUnsignedInABase ==> std::string: The default string conversion routines use the symbol set 0-9, A-Z and therefore support only up to base 36.  You tried a conversion with a base over 36; write your own string conversion routine.";
-#endif
 	if (len == 0)
 		return std::string("0");
 	// Some compilers don't have push_back, so use a char * buffer instead.