Refactor extension event distribution to use Values instead of JSON strings.

chrome/browser/extensions/extension_browser_event_router.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 108 matching lines @@
 
   // Internal processing of tab updated events. Is called by both TabChangedAt
   // and Observe/NAV_ENTRY_COMMITTED.
   void TabUpdated(content::WebContents* contents, bool did_navigate);
 
   // The DispatchEvent methods forward events to the |profile|'s event router.
   // The ExtensionBrowserEventRouter listens to events for all profiles,
   // so we avoid duplication by dropping events destined for other profiles.
   void DispatchEvent(Profile* profile,
                      const char* event_name,
-                     const std::string& json_args);
+                     base::ListValue* arguments);
 
   void DispatchEventToExtension(Profile* profile,
                                 const std::string& extension_id,
                                 const char* event_name,
-                                const std::string& json_args);
+                                base::ListValue* event_args);
 
   void DispatchEventsAcrossIncognito(Profile* profile,
                                      const char* event_name,
-                                     const std::string& json_args,
-                                     const std::string& cross_incognito_args);
+                                     base::ListValue* event_args,
+                                     base::ListValue* cross_incognito_args);
 
   void DispatchEventWithTab(Profile* profile,
                             const std::string& extension_id,
                             const char* event_name,
                             const content::WebContents* web_contents,
                             bool active);
 
   void DispatchSimpleBrowserEvent(Profile* profile,
                                   const int window_id,
                                   const char* event_name);
@@ skipping 84 matching lines @@
   Profile* focused_profile_;
 
   // The currently focused window. We keep this so as to avoid sending multiple
   // windows.onFocusChanged events with the same windowId.
   int focused_window_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionBrowserEventRouter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_