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 32 matching lines @@
 #endif
 
 namespace WebCore {
 
 static const double fontLoadWaitLimitSec = 3.0;
 
 FontResource::FontResource(const ResourceRequest& resourceRequest)
     : Resource(resourceRequest, Font)
     , m_loadInitiated(false)
     , m_exceedsFontLoadWaitLimit(false)
+    , m_corsFailed(false)
     , m_fontLoadWaitLimitTimer(this, &FontResource::fontLoadWaitLimitCallback)
 {
 }
 
 FontResource::~FontResource()
 {
 }
 
 void FontResource::load(ResourceFetcher*, const ResourceLoaderOptions& options)
 {
@@ skipping 114 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 (m_corsFailed) {
+        while (FontResourceClient* client = w.next())
+            client->corsFailed(this);
+    } else {
+        while (FontResourceClient* c = w.next())
+            c->fontLoaded(this);
+    }
 }
 
 }