Add UMA for <webview> APIs: a. ClearData, b. when Permission request is allowed.

chrome/browser/guestview/webview/plugin_permission_helper.h

 // Copyright (c) 2013 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_GUESTVIEW_WEBVIEW_PLUGIN_PERMISSION_HELPER_H_
 #define CHROME_BROWSER_GUESTVIEW_WEBVIEW_PLUGIN_PERMISSION_HELPER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
@@ skipping 20 matching lines @@
   void OnNPAPINotSupported(const std::string& identifier);
   void OnOpenAboutPlugins();
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   void OnFindMissingPlugin(int placeholder_id, const std::string& mime_type);
 
   void OnRemovePluginPlaceholderHost(int placeholder_id);
 #endif
 
   void OnPermissionResponse(const std::string& identifier,
                             bool allow,
-                            const std::string& user_input);
+                            const std::string& user_input,
+                            bool user_initiated);
 
   base::WeakPtrFactory<PluginPermissionHelper> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginPermissionHelper);
 };
 
 #endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_PLUGIN_PERMISSION_HELPER_H_