DevTools: follow up to r288297, check rvh for being null in all branches.

content/browser/devtools/renderer_overrides_handler.h

 // Copyright (c) 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_BROWSER_DEVTOOLS_RENDERER_OVERRIDES_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_RENDERER_OVERRIDES_HANDLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "content/browser/devtools/devtools_protocol.h"
 #include "content/common/content_export.h"
 
 class SkBitmap;
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 
-class DevToolsAgentHost;
 class DevToolsTracingHandler;
 class RenderViewHostImpl;
 
 // Overrides Inspector commands before they are sent to the renderer.
 // May override the implementation completely, ignore it, or handle
 // additional browser process implementation details.
 class CONTENT_EXPORT RendererOverridesHandler
     : public DevToolsProtocol::Handler {
  public:
-  explicit RendererOverridesHandler(DevToolsAgentHost* agent);
+  RendererOverridesHandler();
   virtual ~RendererOverridesHandler();
 
   void OnClientDetached();
   void OnSwapCompositorFrame(const cc::CompositorFrameMetadata& frame_metadata);
   void OnVisibilityChanged(bool visible);
-  void OnRenderViewHostChanged();
+  void SetRenderViewHost(RenderViewHostImpl* host);
+  void ClearRenderViewHost();
   bool OnSetTouchEventEmulationEnabled();
 
  private:
   void InnerSwapCompositorFrame();
 
   // DOM domain.
   scoped_refptr<DevToolsProtocol::Response>
       GrantPermissionsForSetFileInputFiles(
           scoped_refptr<DevToolsProtocol::Command> command);
 
@@ skipping 42 matching lines @@
   void PageQueryUsageAndQuotaCompleted(
      scoped_refptr<DevToolsProtocol::Command>,
      scoped_ptr<base::DictionaryValue> response_data);
 
   void NotifyScreencastVisibility(bool visible);
 
   // Input domain.
   scoped_refptr<DevToolsProtocol::Response> InputEmulateTouchFromMouseEvent(
       scoped_refptr<DevToolsProtocol::Command> command);
 
-  RenderViewHostImpl* GetRenderViewHostImpl();
-
-  DevToolsAgentHost* agent_;
+  RenderViewHostImpl* host_;
   scoped_refptr<DevToolsProtocol::Command> screencast_command_;
   bool has_last_compositor_frame_metadata_;
   cc::CompositorFrameMetadata last_compositor_frame_metadata_;
   base::TimeTicks last_frame_time_;
   int capture_retry_count_;
   base::WeakPtrFactory<RendererOverridesHandler> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(RendererOverridesHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_RENDERER_OVERRIDES_HANDLER_H_