Add extension event histogram values for messaging, webRequest, and webview.

extensions/browser/api/web_request/web_request_api.h

 // Copyright (c) 2012 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 EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_API_H_
 #define EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_API_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 253 matching lines @@
       const std::string& extension_id,
       const std::string& event_name,
       const std::string& sub_event_name,
       uint64 request_id,
       EventResponse* response);
 
   // Adds a listener to the given event. |event_name| specifies the event being
   // listened to. |sub_event_name| is an internal event uniquely generated in
   // the extension process to correspond to the given filter and
   // extra_info_spec. It returns true on success, false on failure.
-  bool AddEventListener(
-      void* browser_context,
-      const std::string& extension_id,
-      const std::string& extension_name,
-      const std::string& event_name,
-      const std::string& sub_event_name,
-      const RequestFilter& filter,
-      int extra_info_spec,
-      int embedder_process_id,
-      int web_view_instance_id,
-      base::WeakPtr<IPC::Sender> ipc_sender);
+  bool AddEventListener(void* browser_context,
+                        const std::string& extension_id,
+                        const std::string& extension_name,
+                        events::HistogramValue histogram_value,
+                        const std::string& event_name,
+                        const std::string& sub_event_name,
+                        const RequestFilter& filter,
+                        int extra_info_spec,
+                        int embedder_process_id,
+                        int web_view_instance_id,
+                        base::WeakPtr<IPC::Sender> ipc_sender);
 
   // Removes the listener for the given sub-event.
   void RemoveEventListener(
       void* browser_context,
       const std::string& extension_id,
       const std::string& sub_event_name,
       int embedder_process_id,
       int web_view_instance_id);
 
   // Removes the listeners for a given <webview>.
@@ skipping 255 matching lines @@
       extensions::QuotaLimitHeuristics* heuristics) const override;
   // Handle quota exceeded gracefully: Only warn the user but still execute the
   // function.
   void OnQuotaExceeded(const std::string& error) override;
   bool RunSync() override;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_API_H_