diff --git a/fpdfsdk/include/javascript/Consts.h b/fpdfsdk/include/javascript/Consts.h
index c3a954e..5d19064 100644
--- a/fpdfsdk/include/javascript/Consts.h
+++ b/fpdfsdk/include/javascript/Consts.h
@@ -7,6 +7,8 @@
 #ifndef _CONSTS_H_
 #define _CONSTS_H_
 
+#include "JS_Define.h"
+
 /* ------------------------------ border ------------------------------ */
 
 class CJS_Border : public CJS_Object
diff --git a/fpdfsdk/include/javascript/Document.h b/fpdfsdk/include/javascript/Document.h
index 8aa53fe..0824185 100644
--- a/fpdfsdk/include/javascript/Document.h
+++ b/fpdfsdk/include/javascript/Document.h
@@ -7,7 +7,7 @@
 #ifndef _DOCUMENT_H_
 #define _DOCUMENT_H_
 
-
+#include "JS_Define.h"
 
 class PrintParamsObj : public CJS_EmbedObj
 {
diff --git a/fpdfsdk/include/javascript/Field.h b/fpdfsdk/include/javascript/Field.h
index ba834b9..f9e5e49 100644
--- a/fpdfsdk/include/javascript/Field.h
+++ b/fpdfsdk/include/javascript/Field.h
@@ -7,6 +7,11 @@
 #ifndef _FIELD_H_
 #define _FIELD_H_
 
+#include <string>  // For std::wstring.
+
+// TODO(tsepez): include PWL_Wnd.h for PWL_Color after fixing its IWYU.
+#include "JS_Define.h"
+
 class Document;
 
 enum FIELD_PROP
diff --git a/fpdfsdk/include/javascript/Icon.h b/fpdfsdk/include/javascript/Icon.h
index e07ae8e..097917a 100644
--- a/fpdfsdk/include/javascript/Icon.h
+++ b/fpdfsdk/include/javascript/Icon.h
@@ -7,20 +7,19 @@
 #ifndef _ICON_H_
 #define _ICON_H_
 
+#include "JS_Define.h"
+
 class Icon : public CJS_EmbedObj
 {
 public:
 	Icon(CJS_Object* pJSObject);
 	virtual ~Icon();
-
-public:
 	FX_BOOL name(IFXJS_Context* cc, CJS_PropValue& vp, CFX_WideString& sError);
-	
-public:
 	void				SetStream(CPDF_Stream* pIconStream);
 	CPDF_Stream*		GetStream();
 	void				SetIconName(CFX_WideString name);
 	CFX_WideString		GetIconName();
+
 private:
 	CPDF_Stream*		m_pIconStream;
 	CFX_WideString		m_swIconName;
diff --git a/fpdfsdk/include/javascript/JS_Context.h b/fpdfsdk/include/javascript/JS_Context.h
index adb28cd..b35ba3b 100644
--- a/fpdfsdk/include/javascript/JS_Context.h
+++ b/fpdfsdk/include/javascript/JS_Context.h
@@ -7,6 +7,10 @@
 #ifndef _JS_CONTEXT_H_
 #define _JS_CONTEXT_H_
 
+#include "../../../core/include/fxcrt/fx_system.h"
+#include "../../../core/include/fxcrt/fx_string.h"
+#include "IJavaScript.h"
+
 class CJS_EventHandler;
 class CJS_Runtime;
 
diff --git a/fpdfsdk/include/javascript/JS_Define.h b/fpdfsdk/include/javascript/JS_Define.h
index 2213ff9..7175ece 100644
--- a/fpdfsdk/include/javascript/JS_Define.h
+++ b/fpdfsdk/include/javascript/JS_Define.h
@@ -10,10 +10,6 @@
 #include "../jsapi/fxjs_v8.h"
 #include "resource.h"
 
-typedef v8::Value			JSValue;
-typedef v8::Handle<v8::Object>	JSObject;
-typedef v8::Handle<v8::Object>	JSFXObject;
-
 #include "JS_Object.h"
 #include "JS_Value.h"
 
diff --git a/fpdfsdk/include/javascript/JS_EventHandler.h b/fpdfsdk/include/javascript/JS_EventHandler.h
index d16933a..a6736d3 100644
--- a/fpdfsdk/include/javascript/JS_EventHandler.h
+++ b/fpdfsdk/include/javascript/JS_EventHandler.h
@@ -7,7 +7,14 @@
 #ifndef _JS_EVENTHANDLER_H_
 #define _JS_EVENTHANDLER_H_
 
+#include "../../../core/include/fxcrt/fx_string.h"
+#include "../../../core/include/fxcrt/fx_system.h"
+
 class CJS_Context;
+class CPDFSDK_Annot;
+class CPDFSDK_Document;
+class CPDF_Bookmark;
+class CPDF_FormField;
 class Field;
 
 enum JS_EVENT_T
diff --git a/fpdfsdk/include/javascript/JS_GlobalData.h b/fpdfsdk/include/javascript/JS_GlobalData.h
index c54d7b5..b21a360 100644
--- a/fpdfsdk/include/javascript/JS_GlobalData.h
+++ b/fpdfsdk/include/javascript/JS_GlobalData.h
@@ -7,6 +7,8 @@
 #ifndef _JS_GLOBALDATA_H_
 #define _JS_GLOBALDATA_H_
 
+#include "../../../core/include/fxcrt/fx_basic.h"
+
 #define JS_GLOBALDATA_TYPE_NUMBER		0
 #define JS_GLOBALDATA_TYPE_BOOLEAN		1
 #define JS_GLOBALDATA_TYPE_STRING		2
@@ -14,8 +16,7 @@
 #define JS_GLOBALDATA_TYPE_NULL			4
 
 class CJS_KeyValue;
-class CJS_GlobalVariableArray;
-class CJS_GlobalData_Element;
+class CPDFDoc_Environment;
 
 class CJS_GlobalVariableArray
 {
diff --git a/fpdfsdk/include/javascript/JS_Module.h b/fpdfsdk/include/javascript/JS_Module.h
deleted file mode 100644
index 1fcb583..0000000
--- a/fpdfsdk/include/javascript/JS_Module.h
+++ /dev/null
@@ -1,47 +0,0 @@
-// 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
-
-#ifndef _JS_MODULE_H_
-#define _JS_MODULE_H_
-
-class CJS_GlobalData;
-class CJS_ConsoleDlg;
-
-class CJS_Module : public IReader_Module
-{
-public:
-	CJS_Module(HMODULE hModule, CReader_App* pApp);
-	virtual ~CJS_Module();
-
-	virtual void					Destroy(){delete this;}
-	virtual CFX_ByteString			GetModuleName();
-
-public:
-	static CJS_Module*				GetModule(CReader_App* pApp);
-
-	IFXJS_Runtime*					NewJSRuntime();
-	CJS_GlobalData*					NewGlobalData();
-	void							ReleaseGlobalData();
-
-public:
-	//console
-	void							ShowConsole();
-	void							HideConsole();
-	void							ClearConsole();
-	void							PrintLineConsole(FX_LPCWSTR string);
-
-private:
-	HMODULE							m_hModule;
-	CReader_App*					m_pApp;
-
-	FX_BOOL							m_bInitial;
-	CJS_GlobalData*					m_pGlobalData;
-	FX_INT32						m_nGlobalDataCount;
-
-	CJS_ConsoleDlg*					m_pConsole;
-};
-
-#endif //_JS_MODULE_H_
\ No newline at end of file
diff --git a/fpdfsdk/include/javascript/JS_Object.h b/fpdfsdk/include/javascript/JS_Object.h
index f30bc17..74af9ba 100644
--- a/fpdfsdk/include/javascript/JS_Object.h
+++ b/fpdfsdk/include/javascript/JS_Object.h
@@ -10,6 +10,7 @@
 #include "../fsdk_define.h"  // For FX_UINT
 #include "../fsdk_mgr.h"  // For CPDFDoc_Environment
 #include "../fx_systemhandler.h"  // For IFX_SystemHandler
+#include "../jsapi/fxjs_v8.h"
 
 class CPDFSDK_PageView;
 class CJS_Object;
diff --git a/fpdfsdk/include/javascript/JS_Runtime.h b/fpdfsdk/include/javascript/JS_Runtime.h
index 96f00bb..86d4971 100644
--- a/fpdfsdk/include/javascript/JS_Runtime.h
+++ b/fpdfsdk/include/javascript/JS_Runtime.h
@@ -7,6 +7,13 @@
 #ifndef _JS_RUNTIME_H_
 #define _JS_RUNTIME_H_
 
+#include "../../../core/include/fxcrt/fx_basic.h"
+#include "../jsapi/fxjs_v8.h"
+#include "IJavaScript.h"
+#include "JS_EventHandler.h"
+
+class CJS_Context;
+
 class CJS_FieldEvent
 {
 public:
diff --git a/fpdfsdk/include/javascript/JS_Value.h b/fpdfsdk/include/javascript/JS_Value.h
index 165898c..1431349 100644
--- a/fpdfsdk/include/javascript/JS_Value.h
+++ b/fpdfsdk/include/javascript/JS_Value.h
@@ -7,6 +7,9 @@
 #ifndef _JS_VALUE_H_
 #define _JS_VALUE_H_
 
+#include "../jsapi/fxjs_v8.h"
+#include "../../../core/include/fxcrt/fx_basic.h"
+
 class CJS_Array;
 class CJS_Date;
 class CJS_Document;
diff --git a/fpdfsdk/include/javascript/PublicMethods.h b/fpdfsdk/include/javascript/PublicMethods.h
index 1decb6f..e7a4010 100644
--- a/fpdfsdk/include/javascript/PublicMethods.h
+++ b/fpdfsdk/include/javascript/PublicMethods.h
@@ -7,6 +7,8 @@
 #ifndef _PUBLICMETHODS_H_
 #define _PUBLICMETHODS_H_
 
+#include "JS_Define.h"
+
 class CJS_PublicMethods : public CJS_Object
 {
 public:
diff --git a/fpdfsdk/include/javascript/app.h b/fpdfsdk/include/javascript/app.h
index 3acbb81..a515df4 100644
--- a/fpdfsdk/include/javascript/app.h
+++ b/fpdfsdk/include/javascript/app.h
@@ -7,6 +7,8 @@
 #ifndef _APP_H_
 #define _APP_H_
 
+#include "JS_Define.h"
+
 class CJS_Runtime;
 
 /* ---------------------------- TimerObj ---------------------------- */
diff --git a/fpdfsdk/include/javascript/color.h b/fpdfsdk/include/javascript/color.h
index d042a67..6eeb37b 100644
--- a/fpdfsdk/include/javascript/color.h
+++ b/fpdfsdk/include/javascript/color.h
@@ -7,6 +7,9 @@
 #ifndef _COLOR_H_
 #define _COLOR_H_
 
+#include "JS_Define.h"
+// TODO(tsepez): include CPWL_Color.h once its own IWYU is fixed.
+
 class color : public CJS_EmbedObj
 {
 public:
diff --git a/fpdfsdk/include/javascript/console.h b/fpdfsdk/include/javascript/console.h
index 336ba08..60326aa 100644
--- a/fpdfsdk/include/javascript/console.h
+++ b/fpdfsdk/include/javascript/console.h
@@ -7,6 +7,8 @@
 #ifndef _CONSOLE_H_
 #define _CONSOLE_H_
 
+#include "JS_Define.h"
+
 class console : public CJS_EmbedObj
 {
 public:
diff --git a/fpdfsdk/include/javascript/event.h b/fpdfsdk/include/javascript/event.h
index 94b4124..b3418c2 100644
--- a/fpdfsdk/include/javascript/event.h
+++ b/fpdfsdk/include/javascript/event.h
@@ -7,6 +7,8 @@
 #ifndef _EVENT_H_
 #define _EVENT_H_
 
+#include "JS_Define.h"
+
 class event : public CJS_EmbedObj
 {
 public:
diff --git a/fpdfsdk/include/javascript/global.h b/fpdfsdk/include/javascript/global.h
index b7e6e51..9ee9f42 100644
--- a/fpdfsdk/include/javascript/global.h
+++ b/fpdfsdk/include/javascript/global.h
@@ -7,7 +7,11 @@
 #ifndef _GLOBAL_H_
 #define _GLOBAL_H_
 
+#include "JS_Define.h"
+
 class CJS_GlobalData;
+class CJS_GlobalVariableArray;
+class CJS_KeyValue;
 
 struct js_global_data
 {
diff --git a/fpdfsdk/include/javascript/report.h b/fpdfsdk/include/javascript/report.h
index 822250e..05e7ddd 100644
--- a/fpdfsdk/include/javascript/report.h
+++ b/fpdfsdk/include/javascript/report.h
@@ -7,6 +7,8 @@
 #ifndef _REPORT_H_
 #define _REPORT_H_
 
+#include "JS_Define.h"
+
 class Report : public CJS_EmbedObj
 {
 public:
diff --git a/fpdfsdk/include/javascript/util.h b/fpdfsdk/include/javascript/util.h
index 72473d0..7601f7a 100644
--- a/fpdfsdk/include/javascript/util.h
+++ b/fpdfsdk/include/javascript/util.h
@@ -7,6 +7,10 @@
 #ifndef _UTIL_H_
 #define _UTIL_H_
 
+#include <string>  // For std::wstring.
+
+#include "JS_Define.h"
+
 class util : public CJS_EmbedObj
 {
 public: