Implement API for accessing fonts installed locally on the system.

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index b92cc9f169a07136ed28785165f0c22cec50f0a6..93a11246065720461dadfaddbb4212712f09429a 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -74,6 +74,7 @@ class WebFallbackThemeEngine;
 class WebFileSystem;
 class WebFileUtilities;
 class WebFlingAnimator;
+class WebFontAccess;
 class WebGeofencingProvider;
 class WebGestureCurve;
 class WebGraphicsContext3DProvider;
@@ -744,6 +745,8 @@ public:
 
     virtual WebSyncProvider* backgroundSyncProvider() { return nullptr; }
 
+    virtual WebFontAccess* fontAccess() { return nullptr; }
+
 protected:
     BLINK_PLATFORM_EXPORT Platform();
     virtual ~Platform() { }