Allow Blink to generate cc::FrameSinkId from RenderThread

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 37 matching lines @@
 #include "WebPlatformEventType.h"
 #include "WebSize.h"
 #include "WebSpeechSynthesizer.h"
 #include "WebStorageQuotaCallbacks.h"
 #include "WebStorageQuotaType.h"
 #include "WebString.h"
 #include "WebURLError.h"
 #include "WebVector.h"
 #include "base/metrics/user_metrics_action.h"
 #include "cc/resources/shared_bitmap.h"
+#include "cc/surfaces/frame_sink_id.h"
 
 class GrContext;
 
 namespace gpu {
 class GpuMemoryBufferManager;
 }
 
 namespace v8 {
 class Context;
 template <class T>
@@ skipping 246 matching lines @@
   // Returns the maximum amount of memory a decoded image should be allowed.
   // See comments on ImageDecoder::m_maxDecodedBytes.
   virtual size_t maxDecodedImageBytes() { return noDecodedImageByteLimit; }
 
   // Process -------------------------------------------------------------
 
   // Returns a unique identifier for a process. This may not necessarily be
   // the process's process ID.
   virtual uint32_t getUniqueIdForProcess() { return 0; }
 
+  // Returns a unique FrameSinkID for the current renderer process
+  virtual cc::FrameSinkId generateFrameSinkId() { return cc::FrameSinkId(); }
+
   // Message Ports -------------------------------------------------------
 
   // Creates a Message Port Channel pair. This can be called on any thread.
   // The returned objects should only be used on the thread they were created
   // on.
   virtual void createMessageChannel(WebMessagePortChannel** channel1,
                                     WebMessagePortChannel** channel2) {
     *channel1 = 0;
     *channel2 = 0;
   }
@@ skipping 341 matching lines @@
  protected:
   Platform();
   virtual ~Platform() {}
 
   WebThread* m_mainThread;
 };
 
 }  // namespace blink
 
 #endif