Switch to direct write font proxy and remove the font cache.

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 587b731a7b980b555181020d13447ca6466d100e..62ab8fe6a6b6d3c2b89b5c735e9ee08044a313d2 100644
--- a/content/common/font_warmup_win.h
+++ b/content/common/font_warmup_win.h
@@ -13,14 +13,6 @@ class SkTypeface;
 
 namespace content {
 
-// Make necessary calls to cache the data for a given font, used before
-// sandbox lockdown.
-CONTENT_EXPORT void DoPreSandboxWarmupForTypeface(SkTypeface* typeface);
-
-// Get the shared font manager used during pre-sandbox warmup for DirectWrite
-// fonts.
-CONTENT_EXPORT SkFontMgr* GetPreSandboxWarmupFontMgr();
-
 class GdiFontPatchData {
  public:
   virtual ~GdiFontPatchData() {}
@@ -43,13 +35,6 @@ 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();
-
 // Directwrite connects to the font cache service to retrieve information about
 // fonts installed on the system etc. This works well outside the sandbox and
 // within the sandbox as long as the lpc connection maintained by the current