Implement frame attribution (FrameBlamer)

third_party/WebKit/Source/core/frame/FrameClient.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef FrameClient_h
 #define FrameClient_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
+#include "public/platform/BlameContext.h"
 
 namespace blink {
 
 class Frame;
 class LocalFrame;
 class MessageEvent;
 class SecurityOrigin;
 enum class FrameDetachType;
 
 class CORE_EXPORT FrameClient : public NoBaseWillBeGarbageCollectedFinalized<FrameClient> {
@@ skipping 16 matching lines @@
     virtual Frame* firstChild() const = 0;
     virtual Frame* lastChild() const = 0;
 
     virtual unsigned backForwardLength() = 0;
 
     // Returns true if the embedder intercepted the postMessage call
     virtual bool willCheckAndDispatchMessageEvent(SecurityOrigin* /*target*/, MessageEvent*, LocalFrame* /*sourceFrame*/) const { return false; }
 
     virtual void frameFocused() const = 0;
 
+    virtual BlameContext* frameBlameContext() { return nullptr; }
+
     virtual ~FrameClient() { }
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
 } // namespace blink
 
 #endif // FrameClient_h