Add Blink setting to block doc.written scripts on 2g-like networks

third_party/WebKit/Source/core/loader/FrameLoaderClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * 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.
@@ skipping 251 matching lines @@
     enum SuddenTerminationDisablerType {
         BeforeUnloadHandler,
         UnloadHandler,
     };
     virtual void suddenTerminationDisablerChanged(bool present, SuddenTerminationDisablerType) { }
 
     virtual LinkResource* createServiceWorkerLinkResource(HTMLLinkElement*) { return nullptr; }
 
     // Effective connection type when this frame was loaded.
     virtual WebEffectiveConnectionType getEffectiveConnectionType() { return WebEffectiveConnectionType::TypeUnknown; }
+    virtual void setEffectiveConnectionTypeOverride(blink::WebEffectiveConnectionType) {}
+    virtual void clearEffectiveConnectionTypeOverride() {}
 
     // Overwrites the given URL to use an HTML5 embed if possible.
     // An empty URL is returned if the URL is not overriden.
     virtual KURL overrideFlashEmbedWithHTML(const KURL&) { return KURL(); }
 };
 
 } // namespace blink
 
 #endif // FrameLoaderClient_h