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 69bae2206a1a6403cb5ed5c81a53aa77f5df0eef..56c93ba7e9c7513896ca94029debb8a2b139eaab 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -73,6 +73,7 @@ class WebFallbackThemeEngine;
 class WebFileSystem;
 class WebFileUtilities;
 class WebFlingAnimator;
+class WebFontAccess;
 class WebGeofencingProvider;
 class WebGestureCurve;
 class WebGraphicsContext3DProvider;
@@ -640,6 +641,8 @@ public:
 
     virtual WebSyncProvider* backgroundSyncProvider() { return nullptr; }
 
+    virtual WebFontAccess* fontAccess() { return nullptr; }
+
 protected:
     BLINK_PLATFORM_EXPORT Platform();
     virtual ~Platform() { }