<browser> Disable browser plugin in content_shell by default.

content/shell/shell_content_renderer_client.h

 // Copyright (c) 2012 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_SHELL_SHELL_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_SHELL_SHELL_CONTENT_RENDERER_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/renderer/content_renderer_client.h"
 
+namespace WebKit {
+class WebFrame;
+class WebPlugin;
+struct WebPluginParams;
+}
+
 namespace content {
 
+class RenderView;
 class ShellRenderProcessObserver;
 
 class ShellContentRendererClient : public ContentRendererClient {
  public:
   ShellContentRendererClient();
   virtual ~ShellContentRendererClient();
   virtual void RenderThreadStarted() OVERRIDE;
   virtual void RenderViewCreated(RenderView* render_view) OVERRIDE;
+  virtual bool OverrideCreatePlugin(
+      RenderView* render_view,
+      WebKit::WebFrame* frame,
+      const WebKit::WebPluginParams& params,
+      WebKit::WebPlugin** plugin) OVERRIDE;
 
  private:
   scoped_ptr<ShellRenderProcessObserver> shell_observer_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_CONTENT_RENDERER_CLIENT_H_