Add UMA metrics for blocked plugins.

chrome/browser/content_settings/tab_specific_content_settings.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_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "chrome/browser/geolocation/geolocation_settings_state.h"
@@ skipping 151 matching lines @@
   virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStartProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       bool is_error_page,
       RenderViewHost* render_view_host) OVERRIDE;
 
   // Message handlers. Public for testing.
   void OnContentBlocked(ContentSettingsType type,
-                        const std::string& resource_identifier);
+                        const std::string& resource_identifier,
+                        ContentSetting setting);
   void OnAppCacheAccessed(const GURL& manifest_url, bool blocked_by_policy);
 
   // These methods are invoked on the UI thread by the static functions above.
   // Public for testing.
   void OnCookiesRead(const GURL& url,
                      const net::CookieList& cookie_list,
                      bool blocked_by_policy);
   void OnCookieChanged(const GURL& url,
                        const std::string& cookie_line,
                        const net::CookieOptions& options,
@@ skipping 94 matching lines @@
 
   // Stores whether the user can load blocked plugins on this page.
   bool load_plugins_link_enabled_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(TabSpecificContentSettings);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_