Set WebFont priority to very low if the network is detected to be slow

third_party/WebKit/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 157 matching lines @@
   Resource::allClientsAndObserversRemoved();
 }
 
 void FontResource::checkNotify() {
   m_fontLoadShortLimitTimer.stop();
   m_fontLoadLongLimitTimer.stop();
 
   Resource::checkNotify();
 }
 
+bool FontResource::isLowPriorityLoadingAllowedForRemoteFont() const {
+  assert(!url().protocolIsData());
+  assert(!isLoaded());

[hiroshige, 2016/11/15 06:05:41]

Please use DCHECK() instead of assert().

[tbansal1, 2016/11/15 08:17:04]

Done. Thanks for catching this.

+  ResourceClientWalker<FontResourceClient> walker(clients());
+  while (FontResourceClient* client = walker.next()) {
+    if (!client->isLowPriorityLoadingAllowedForRemoteFont()) {
+      return false;
+    }
+  }
+  return true;
+}
+
 }  // namespace blink