Timeline: add support for deferred canvas rasterization

Source/core/platform/PlatformInstrumentation.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 28 matching lines @@
 namespace WebCore {
 
 class PlatformInstrumentationClient {
 public:
     virtual ~PlatformInstrumentationClient();
 
     virtual void willDecodeImage(const String& imageType) = 0;
     virtual void didDecodeImage() = 0;
     virtual void willResizeImage(bool shouldCache) = 0;
     virtual void didResizeImage() = 0;
+    virtual void willRasterizeCanvas() = 0;
+    virtual void didRasterizeCanvas() = 0;
 };
 
 class PlatformInstrumentation {
 public:
     static const char ImageDecodeEvent[];
     static const char ImageResizeEvent[];
 
     static const char ImageTypeArgument[];
     static const char CachedArgument[];
 
     static void setClient(PlatformInstrumentationClient*);
     static bool hasClient() { return m_client; }
 
     static void willDecodeImage(const String& imageType);
     static void didDecodeImage();
     static void willResizeImage(bool shouldCache);
     static void didResizeImage();
+    static void willRasterizeCanvas();
+    static void didRasterizeCanvas();
 
 private:
     static const char CategoryName[];
 
     static PlatformInstrumentationClient* m_client;
 };
 
 #define FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD() if (!m_client || !isMainThread()) return;
 
 inline void PlatformInstrumentation::willDecodeImage(const String& imageType)
@@ skipping 17 matching lines @@
     m_client->willResizeImage(shouldCache);
 }
 
 inline void PlatformInstrumentation::didResizeImage()
 {
     TRACE_EVENT_END0(CategoryName, ImageResizeEvent);
     FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
     m_client->didResizeImage();
 }
 
+inline void PlatformInstrumentation::willRasterizeCanvas()
+{
+    FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
+    m_client->willRasterizeCanvas();
+}
+
+inline void PlatformInstrumentation::didRasterizeCanvas()
+{
+    FAST_RETURN_IF_NO_CLIENT_OR_NOT_MAIN_THREAD();
+    m_client->didRasterizeCanvas();
+}
+
 } // namespace WebCore
 
 #endif // PlatformInstrumentation_h