Implement frame attribution (FrameBlamer)

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 45 matching lines @@
 #include "base/metrics/user_metrics_action.h"
 
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/system/core.h"
 
 class GrContext;
 
 namespace blink {
 
 class WebAudioBus;
+class WebBlameContext;
 class WebBlobRegistry;
 class WebCanvasCaptureHandler;
 class WebClipboard;
 class WebCompositorSupport;
 class WebCookieJar;
 class WebCrypto;
 class WebDatabaseObserver;
 class WebDiscardableMemory;
 class WebPlatformEventListener;
 class WebFallbackThemeEngine;
@@ skipping 268 matching lines @@
 
     // Threads -------------------------------------------------------
 
     // Creates an embedder-defined thread.
     virtual WebThread* createThread(const char* name) { return nullptr; }
 
     // Returns an interface to the current thread. This is owned by the
     // embedder.
     virtual WebThread* currentThread() { return nullptr; }
 
+    // Returns a blame context for attributing work to the thread-global scope.
+    virtual WebBlameContext* threadBlameContext() { return nullptr; }
+
     // Resources -----------------------------------------------------------
 
     // Returns a blob of data corresponding to the named resource.
     virtual WebData loadResource(const char* name) { return WebData(); }
 
     // Decodes the in-memory audio file data and returns the linear PCM audio data in the destinationBus.
     // A sample-rate conversion to sampleRate will occur if the file data is at a different sample-rate.
     // Returns true on success.
     virtual bool loadAudioResource(WebAudioBus* destinationBus, const char* audioFileData, size_t dataSize) { return false; }
 
@@ skipping 247 matching lines @@
 protected:
     BLINK_PLATFORM_EXPORT Platform();
     virtual ~Platform() { }
 
     WebThread* m_mainThread;
 };
 
 } // namespace blink
 
 #endif