Don't depend on the embedder creating a plugin. That way embedders can always provide an empty Co...

content/shell/shell_content_renderer_client.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_SHELL_SHELL_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_SHELL_SHELL_CONTENT_RENDERER_CLIENT_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "content/renderer/content_renderer_client.h"
 
 namespace content {
 
 class ShellContentRendererClient : public ContentRendererClient {
  public:
   virtual ~ShellContentRendererClient();
   virtual void RenderThreadStarted() OVERRIDE;
   virtual void RenderViewCreated(RenderView* render_view) OVERRIDE;
   virtual void SetNumberOfViews(int number_of_views) OVERRIDE;
   virtual SkBitmap* GetSadPluginBitmap() OVERRIDE;
   virtual std::string GetDefaultEncoding() OVERRIDE;
-  virtual WebKit::WebPlugin* CreatePlugin(
+  virtual bool OverrideCreatePlugin(
       RenderView* render_view,
       WebKit::WebFrame* frame,
-      const WebKit::WebPluginParams& params) OVERRIDE;
+      const WebKit::WebPluginParams& params,
+      WebKit::WebPlugin** plugin) OVERRIDE;
   virtual void ShowErrorPage(RenderView* render_view,
                              WebKit::WebFrame* frame,
                              int http_status_code) OVERRIDE;
   virtual std::string GetNavigationErrorHtml(
       const WebKit::WebURLRequest& failed_request,
       const WebKit::WebURLError& error) OVERRIDE;
   virtual bool RunIdleHandlerWhenWidgetsHidden() OVERRIDE;
   virtual bool AllowPopup(const GURL& creator) OVERRIDE;
   virtual bool ShouldFork(WebKit::WebFrame* frame,
                           const GURL& url,
@@ skipping 23 matching lines @@
                                       std::string* cookies) OVERRIDE;
   virtual bool HandleSetCookieRequest(RenderView* sender,
                                       const GURL& url,
                                       const GURL& first_party_for_cookies,
                                       const std::string& value) OVERRIDE;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_CONTENT_RENDERER_CLIENT_H_