diff --git a/core/fxge/dib/cfx_imagestretcher.cpp b/core/fxge/dib/cfx_imagestretcher.cpp
index 61af22a..f9b828a 100644
--- a/core/fxge/dib/cfx_imagestretcher.cpp
+++ b/core/fxge/dib/cfx_imagestretcher.cpp
@@ -34,31 +34,16 @@
   return format;
 }
 
-}  // namespace
+// Builds a new palette with a size of `CFX_DIBBase::kPaletteSize` from the
+// existing palette in `source`. Note: The caller must make sure that the
+// parameters meet the following conditions:
+//   source       - The format must be `FXDIB_Format::k1bppRgb` and it must
+//                  have a palette.
+//   palette_span - The size must be `CFX_DIBBase::kPaletteSize` to be able
+//                  to hold the new palette.
 
-CFX_ImageStretcher::CFX_ImageStretcher(
-    ScanlineComposerIface* pDest,
-    const RetainPtr<const CFX_DIBBase>& pSource,
-    int dest_width,
-    int dest_height,
-    const FX_RECT& bitmap_rect,
-    const FXDIB_ResampleOptions& options)
-    : m_pDest(pDest),
-      m_pSource(pSource),
-      m_ResampleOptions(options),
-      m_DestWidth(dest_width),
-      m_DestHeight(dest_height),
-      m_ClipRect(bitmap_rect),
-      m_DestFormat(GetStretchedFormat(*pSource)) {
-  DCHECK(m_ClipRect.Valid());
-}
-
-CFX_ImageStretcher::~CFX_ImageStretcher() = default;
-
-// static
-void CFX_ImageStretcher::BuildPaletteFrom1BppSource(
-    const RetainPtr<const CFX_DIBBase>& source,
-    pdfium::span<FX_ARGB> palette_span) {
+void BuildPaletteFrom1BppSource(const RetainPtr<const CFX_DIBBase>& source,
+                                pdfium::span<FX_ARGB> palette_span) {
   DCHECK_EQ(FXDIB_Format::k1bppRgb, source->GetFormat());
   DCHECK(source->HasPalette());
   DCHECK_EQ(CFX_DIBBase::kPaletteSize, palette_span.size());
@@ -84,6 +69,27 @@
   }
 }
 
+}  // namespace
+
+CFX_ImageStretcher::CFX_ImageStretcher(
+    ScanlineComposerIface* pDest,
+    const RetainPtr<const CFX_DIBBase>& pSource,
+    int dest_width,
+    int dest_height,
+    const FX_RECT& bitmap_rect,
+    const FXDIB_ResampleOptions& options)
+    : m_pDest(pDest),
+      m_pSource(pSource),
+      m_ResampleOptions(options),
+      m_DestWidth(dest_width),
+      m_DestHeight(dest_height),
+      m_ClipRect(bitmap_rect),
+      m_DestFormat(GetStretchedFormat(*pSource)) {
+  DCHECK(m_ClipRect.Valid());
+}
+
+CFX_ImageStretcher::~CFX_ImageStretcher() = default;
+
 bool CFX_ImageStretcher::Start() {
   if (m_DestWidth == 0 || m_DestHeight == 0)
     return false;
diff --git a/core/fxge/dib/cfx_imagestretcher.h b/core/fxge/dib/cfx_imagestretcher.h
index 58c5634..7e51dc7 100644
--- a/core/fxge/dib/cfx_imagestretcher.h
+++ b/core/fxge/dib/cfx_imagestretcher.h
@@ -14,7 +14,6 @@
 #include "core/fxcrt/unowned_ptr.h"
 #include "core/fxge/dib/fx_dib.h"
 #include "core/fxge/dib/scanlinecomposer_iface.h"
-#include "third_party/base/span.h"
 
 class CFX_DIBBase;
 class CStretchEngine;
@@ -30,17 +29,6 @@
                      const FXDIB_ResampleOptions& options);
   ~CFX_ImageStretcher();
 
-  // Builds a new palette with a size of `CFX_DIBBase::kPaletteSize` from the
-  // existing palette in `source`. Note: The caller must make sure that the
-  // parameters meet the following conditions:
-  //   source       - The format must be `FXDIB_Format::k1bppRgb` and it must
-  //                  have a palette.
-  //   palette_span - The size must be `CFX_DIBBase::kPaletteSize` to be able
-  //                  to hold the new palette.
-  static void BuildPaletteFrom1BppSource(
-      const RetainPtr<const CFX_DIBBase>& source,
-      pdfium::span<FX_ARGB> palette_span);
-
   bool Start();
   bool Continue(PauseIndicatorIface* pPause);
 
diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index e64fc14..449f6b0 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -39,7 +39,6 @@
 #include "core/fxge/cfx_textrenderoptions.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
 #include "core/fxge/dib/cfx_imagerenderer.h"
-#include "core/fxge/dib/cfx_imagestretcher.h"
 #include "core/fxge/dib/cstretchengine.h"
 #include "core/fxge/dib/fx_dib.h"
 #include "core/fxge/text_char_pos.h"
@@ -155,11 +154,39 @@
          FXARGB_R(color) == FXARGB_B(color);
 }
 
+// Called by Upsample, return a 32 bit-per-pixel buffer filled with 2 colors
+// from a 1 bit-per-pixel source palette.
+DataVector<uint32_t> Fill32BppDestStorageWith1BppSource(
+    const RetainPtr<CFX_DIBBase>& source) {
+  DCHECK_EQ(1, source->GetBPP());
+  int width = source->GetWidth();
+  int height = source->GetHeight();
+  void* buffer = source->GetBuffer().data();
+  DCHECK(buffer);
+
+  uint32_t color0 = source->GetPaletteArgb(0);
+  uint32_t color1 = source->GetPaletteArgb(1);
+  DataVector<uint32_t> dst32_storage(Fx2DSizeOrDie(width, height));
+  pdfium::span<SkPMColor> dst32_pixels(dst32_storage);
+
+  for (int y = 0; y < height; ++y) {
+    const uint8_t* src_row =
+        static_cast<const uint8_t*>(buffer) + y * source->GetPitch();
+    pdfium::span<uint32_t> dst_row = dst32_pixels.subspan(y * width);
+    for (int x = 0; x < width; ++x) {
+      bool use_color1 = src_row[x / 8] & (1 << (7 - x % 8));
+      dst_row[x] = use_color1 ? color1 : color0;
+    }
+  }
+  return dst32_storage;
+}
+
 // Called by Upsample(), returns a 32 bit-per-pixel buffer filled with colors
 // from `palette`.
 DataVector<uint32_t> Fill32BppDestStorageWithPalette(
     const RetainPtr<CFX_DIBBase>& source,
     pdfium::span<const uint32_t> palette) {
+  DCHECK_EQ(8, source->GetBPP());
   int width = source->GetWidth();
   int height = source->GetHeight();
   void* buffer = source->GetBuffer().data();
@@ -593,22 +620,12 @@
 
       if (pSource->GetFormat() == FXDIB_Format::k1bppRgb &&
           pSource->HasPalette()) {
-        // When `pSource` has 1 bit per pixel, its palette will contain 2
-        // colors, and the R,G,B channels of either color will have equal
-        // values. However, there are cases that R,G,B are not all the same and
-        // these 2 colors stand for the boundaries of a range of colors to be
-        // used for bitmap rendering. We need to handle the color palette
-        // differently depending on these conditions.
         uint32_t palette_color0 = pSource->GetPaletteArgb(0);
         uint32_t palette_color1 = pSource->GetPaletteArgb(1);
-        bool use_two_colors = IsRGBColorGrayScale(palette_color0) &&
-                              IsRGBColorGrayScale(palette_color1);
-        if (!use_two_colors) {
-          // If more than 2 colors are provided, calculate the range of colors
-          // and store them in `new_palette`
-          FX_ARGB new_palette[CFX_DIBBase::kPaletteSize];
-          CFX_ImageStretcher::BuildPaletteFrom1BppSource(pSource, new_palette);
-          dst32_storage = Fill32BppDestStorageWithPalette(pSource, new_palette);
+        bool use_gray_colors = IsRGBColorGrayScale(palette_color0) &&
+                               IsRGBColorGrayScale(palette_color1);
+        if (!use_gray_colors) {
+          dst32_storage = Fill32BppDestStorageWith1BppSource(pSource);
           buffer = dst32_storage.data();
           rowBytes = width * sizeof(uint32_t);
           colorType = Get32BitSkColorType(bRgbByteOrder);
diff --git a/testing/SUPPRESSIONS b/testing/SUPPRESSIONS
index 9768236..f022c38 100644
--- a/testing/SUPPRESSIONS
+++ b/testing/SUPPRESSIONS
@@ -491,9 +491,6 @@
 # TODO(chromium:1356149): Remove after associated bug is fixed
 bug_1356149.in mac * * agg
 
-# TODO(chromium:1383708): Remove after associated bug is fixed
-bug_1383708.in * * * skia
-
 # TODO(pdfium:1457): Remove after associated bug is fixed
 bug_1457.in * * * *
 
diff --git a/testing/resources/pixel/bug_1383708_expected_skia.pdf.0.png b/testing/resources/pixel/bug_1383708_expected_skia.pdf.0.png
new file mode 100644
index 0000000..36119e0
--- /dev/null
+++ b/testing/resources/pixel/bug_1383708_expected_skia.pdf.0.png
Binary files differ