Add GetUserMedia ETLD+1 rappor metrics.

third_party/WebKit/public/platform/Platform.h

 /*
  * 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:
  *
  *     * 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 389 matching lines @@
     // Returns an interface to the compositor thread. This can be null if the
     // renderer was created with threaded rendering desabled.
     virtual WebThread* compositorThread() const { return 0; }
 
     // Testing -------------------------------------------------------------
 
     // Gets a pointer to URLLoaderMockFactory for testing. Will not be available in production builds.
     virtual WebURLLoaderMockFactory* getURLLoaderMockFactory() { return nullptr; }
 
     // Record to a RAPPOR privacy-preserving metric, see: https://www.chromium.org/developers/design-documents/rappor.
-    // recordRappor records a sample string, while recordRapporURL records the domain and registry of a url.
+    // recordRappor records a sample string, while recordRapporURL records the eTLD+1 of a url.
     virtual void recordRappor(const char* metric, const WebString& sample) { }
     virtual void recordRapporURL(const char* metric, const blink::WebURL& url) { }
 
     // Record a UMA sequence action.  The UserMetricsAction construction must
     // be on a single line for extract_actions.py to find it.  Please see
     // that script for more details.  Intended use is:
     // recordAction(UserMetricsAction("MyAction"))
     virtual void recordAction(const UserMetricsAction&) { }
 
     class TraceLogEnabledStateObserver {
@@ skipping 184 matching lines @@
 protected:
     Platform();
     virtual ~Platform() { }
 
     WebThread* m_mainThread;
 };
 
 } // namespace blink
 
 #endif