Move unique name generation and tracking into //content.

third_party/WebKit/public/web/WebFrame.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 102 matching lines @@
   // the embedder in response to a frame detached callback to the WebFrame
   // client.
   virtual void close();
 
   // Called by the embedder when it needs to detach the subtree rooted at this
   // frame.
   BLINK_EXPORT void detach();
 
   // Basic properties ---------------------------------------------------
 
-  // The unique name of this frame.
-  virtual WebString uniqueName() const = 0;
-
   // The name of this frame. If no name is given, empty string is returned.
   virtual WebString assignedName() const = 0;
 
   // Sets the name of this frame. For child frames (frames that are not a
   // top-most frame) the actual name may have a suffix appended to make the
   // frame name unique within the hierarchy.
   virtual void setName(const WebString&) = 0;
 
   // The urls of the given combination types of favicon (if any) specified by
   // the document loaded in this frame. The iconTypesMask is a bit-mask of
@@ skipping 325 matching lines @@
   WebFrame* m_firstChild;
   WebFrame* m_lastChild;
 
   WebFrame* m_opener;
   std::unique_ptr<OpenedFrameTracker> m_openedFrameTracker;
 };
 
 }  // namespace blink
 
 #endif