RenderViewHostDelegate: add missing 'virtual'

content/browser/renderer_host/render_view_host_delegate.h

 // Copyright (c) 2011 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_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 309 matching lines @@
   // Notification that a previously unresponsive renderer has become
   // responsive again. The delegate can use this notification to end the
   // warning shown to the user.
   virtual void RendererResponsive(RenderViewHost* render_view_host) {}
 
   // Notification that the RenderViewHost's load state changed.
   virtual void LoadStateChanged(const GURL& url, net::LoadState load_state,
                                 uint64 upload_position, uint64 upload_size) {}
 
   // Notification that a worker process has crashed.
-  void WorkerCrashed() {}
+  virtual void WorkerCrashed() {}
 
   // The page wants the hosting window to activate/deactivate itself (it
   // called the JavaScript window.focus()/blur() method).
   virtual void Activate() {}
   virtual void Deactivate() {}
 
   // Notification that the view has lost capture.
   virtual void LostCapture() {}
 
   // Callback to give the browser a chance to handle the specified keyboard
@@ skipping 15 matching lines @@
   virtual void HandleMouseDown() {}
   virtual void HandleMouseLeave() {}
   virtual void HandleMouseUp() {}
   virtual void HandleMouseActivate() {}
 
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_