Defered collect DirectX diagnostics until they are needed for about:gpu....

chrome/browser/gpu_process_host_ui_shim.h

 // Copyright (c) 2010 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 CHROME_BROWSER_GPU_PROCESS_HOST_UI_SHIM_H_
 #define CHROME_BROWSER_GPU_PROCESS_HOST_UI_SHIM_H_
 #pragma once
 
 // This class lives on the UI thread and supports classes like the
 // BackingStoreProxy, which must live on the UI thread. The IO thread
@@ skipping 33 matching lines @@
   // dispatch the incoming messages from the GPU process, which are
   // actually received on the IO thread.
   virtual bool OnMessageReceived(const IPC::Message& message);
 
   // See documentation on MessageRouter for AddRoute and RemoveRoute
   void AddRoute(int32 routing_id, IPC::Channel::Listener* listener);
   void RemoveRoute(int32 routing_id);
 
   // Sends a message to the browser process to collect the information from the
   // graphics card.
-  void CollectGraphicsInfoAsynchronously();
+  void CollectGraphicsInfoAsynchronously(GPUInfo::Level level);
 
   // Tells the GPU process to crash. Useful for testing.
   void SendAboutGpuCrash();
 
   // Tells the GPU process to let its main thread enter an infinite loop.
   // Useful for testing.
   void SendAboutGpuHang();
 
   // Return all known information about the GPU.
   const GPUInfo& gpu_info() const;
@@ skipping 37 matching lines @@
 
   MessageRouter router_;
 
   // Used only in testing. If set, the callback is invoked when the GPU info
   // has been collected.
   scoped_ptr<Callback0::Type> gpu_info_collected_callback_;
 };
 
 #endif  // CHROME_BROWSER_GPU_PROCESS_HOST_UI_SHIM_H_