Webfont CORS-enabled fetching with fallback

Source/core/fetch/FontResource.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 166 matching lines @@
 
 void FontResource::allClientsRemoved()
 {
     m_fontData.clear();
     Resource::allClientsRemoved();
 }
 
 void FontResource::checkNotify()
 {
     m_fontLoadWaitLimitTimer.stop();
+
     ResourceClientWalker<FontResourceClient> w(m_clients);
-    while (FontResourceClient* c = w.next())
-        c->fontLoaded(this);
+    // FIXME: Remove this CORS fallback once we have enough UMA to make a decision.
+    if (errorOccurred() && m_options.corsEnabled == IsCORSEnabled) {

[Kunihiko Sakamoto, 2014/04/09 10:24:18]

Can we retry only when the error is CORS violation?

[bashi, 2014/04/10 03:40:56]

Done.

+        while (FontResourceClient* client = w.next())
+            client->corsFailed(this);
+    } else {
+        while (FontResourceClient* c = w.next())
+            c->fontLoaded(this);
+    }
 }
 
 }