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

chrome/renderer/chrome_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 CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #pragma once
 
 #include <string>
 
@@ skipping 24 matching lines @@
 class ChromeContentRendererClient : public content::ContentRendererClient {
  public:
   ChromeContentRendererClient();
   virtual ~ChromeContentRendererClient();
 
   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 27 matching lines @@
                                       const std::string& value) OVERRIDE;
 
   // For testing.
   void SetExtensionDispatcher(ExtensionDispatcher* extension_dispatcher);
 
   // Called in low-memory conditions to dump the memory used by the spellchecker
   // and start over.
   void OnPurgeMemory();
 
  private:
-  WebKit::WebPlugin* CreatePluginImpl(
+  WebKit::WebPlugin* CreatePlugin(
       RenderView* render_view,
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params,
       bool* is_default_plugin);
 
   WebKit::WebPlugin* CreatePluginPlaceholder(
       RenderView* render_view,
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params,
       const webkit::npapi::PluginGroup& group,
@@ skipping 16 matching lines @@
   // The SpellCheckProvider is a RenderViewObserver, and handles its own
   // destruction.
   SpellCheckProvider* spellcheck_provider_;
   scoped_ptr<VisitedLinkSlave> visited_link_slave_;
   scoped_ptr<safe_browsing::PhishingClassifierFilter> phishing_classifier_;
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_