Switch the page-capturing machinery to use the new hooks.

content/public/renderer/render_frame_observer.h

 // Copyright 2013 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 CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
+#include "third_party/WebKit/public/web/WebMeaningfulLayout.h"
 #include "v8/include/v8.h"
 
 namespace blink {
 class WebFormElement;
 class WebFrame;
 class WebNode;
 class WebString;
 struct WebURLError;
 }
 
@@ skipping 64 matching lines @@
   // |source| is the Blink-reported source of the error (either external or
   // internal), and |stack_trace| is the stack trace of the error in a
   // human-readable format (each frame is formatted as
   // "\n    at function_name (source:line_number:column_number)").
   virtual void DetailedConsoleMessageAdded(const base::string16& message,
                                            const base::string16& source,
                                            const base::string16& stack_trace,
                                            int32 line_number,
                                            int32 severity_level) {}
 
+  // Called when an interesting (from document lifecycle perspective),
+  // compositor-driven layout had happened. This is a reasonable hook to use
+  // to inspect the document and layout information, since it is in a clean
+  // state and you won't accidentally force new layouts.
+  // The interestingness of layouts is explained in WebMeaningfulLayout.h.
+  virtual void DidMeaningfulLayout(blink::WebMeaningfulLayout layout_type) {}
+
   // Called when a compositor frame has committed.
   virtual void DidCommitCompositorFrame() {}
 
   // Notifications when |PerformanceTiming| data becomes available
   virtual void DidChangePerformanceTiming() {}
 
   // Called when the focused node has changed to |node|.
   virtual void FocusedNodeChanged(const blink::WebNode& node) {}
 
   // IPC::Listener implementation.
@@ skipping 19 matching lines @@
   RenderFrame* render_frame_;
   // The routing ID of the associated RenderFrame.
   int routing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_