Add UMA metrics for blocked plugins.

chrome/common/render_messages.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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 279 matching lines @@
 // Notification that the language for the tab has been determined.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_TranslateLanguageDetermined,
                     std::string  /* page ISO639_1 language code */,
                     bool         /* whether the page can be translated */)
 
 IPC_MESSAGE_CONTROL1(ViewHostMsg_UpdatedCacheStats,
                      WebKit::WebCache::UsageStats /* stats */)
 
 // Tells the browser that content in the current page was blocked due to the
 // user's content settings.
-IPC_MESSAGE_ROUTED2(ViewHostMsg_ContentBlocked,
+IPC_MESSAGE_ROUTED3(ViewHostMsg_ContentBlocked,
                     ContentSettingsType, /* type of blocked content */
-                    std::string /* resource identifier */)
+                    std::string /* resource identifier */,
+                    ContentSetting /* setting */)
 
 // Sent by the renderer process to check whether access to web databases is
 // granted by content settings.
 IPC_SYNC_MESSAGE_CONTROL5_1(ViewHostMsg_AllowDatabase,
                             int /* render_view_id */,
                             GURL /* origin_url */,
                             GURL /* top origin url */,
                             string16 /* database name */,
                             string16 /* database display name */,
                             bool /* allowed */)
@@ skipping 193 matching lines @@
                     int32 /* page_id */,
                     bool  /* result */)
 
 // JavaScript related messages -----------------------------------------------
 
 // Notify the JavaScript engine in the render to change its parameters
 // while performing stress testing.
 IPC_MESSAGE_ROUTED2(ViewMsg_JavaScriptStressTestControl,
                     int /* cmd */,
                     int /* param */)