Added GDI font emulation support for Flash.

content/common/font_warmup_win.h

Index: content/common/font_warmup_win.h
diff --git a/content/common/font_warmup_win.h b/content/common/font_warmup_win.h
index 543826847bf3512f16b6e6ed0902cf4b703a438f..7a0e9b502c7e8c4c3d5c36d29532c3305d63cf8f 100644
--- a/content/common/font_warmup_win.h
+++ b/content/common/font_warmup_win.h
@@ -5,6 +5,7 @@
 #ifndef CONTENT_COMMON_FONT_WARMUP_WIN_H_
 #define CONTENT_COMMON_FONT_WARMUP_WIN_H_
 
+#include "base/files/file_path.h"
 #include "content/common/content_export.h"
 
 class SkFontMgr;
@@ -20,6 +21,32 @@ CONTENT_EXPORT void DoPreSandboxWarmupForTypeface(SkTypeface* typeface);
 // fonts.
 CONTENT_EXPORT SkFontMgr* GetPreSandboxWarmupFontMgr();
 
+class GdiFontPatchData {
+ public:
+  virtual ~GdiFontPatchData() {}
+
+ protected:
+  GdiFontPatchData() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GdiFontPatchData);
+};
+
+// Hook a module's imported GDI font functions to reimplement font enumeration
+// and font data retrieval for DLLs which can't be easily modified.
+CONTENT_EXPORT GdiFontPatchData* PatchGdiFontEnumeration(
+    const base::FilePath& path);
+
+// Testing method to get the number of in-flight emulated GDI handles.
+CONTENT_EXPORT size_t GetEmulatedGdiHandleCountForTesting();
+
+// Testing method to reset the table of emulated GDI handles.
+CONTENT_EXPORT void ResetEmulatedGdiHandlesForTesting();
+
+// Sets the pre-sandbox warmup font manager directly. This should only be used
+// for testing the implementation.
+CONTENT_EXPORT void SetPreSandboxWarmupFontMgrForTesting(SkFontMgr* fontmgr);
+
 // Warmup the direct write font manager for content processes.
 CONTENT_EXPORT void WarmupDirectWrite();