Move ExtensionEventRouter and related into extensions namespace

chrome/browser/extensions/api/proxy/proxy_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.
 
 // Defines the Chrome Extensions Proxy Settings API relevant classes to realize
 // the API as specified in the extension API JSON.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_PROXY_PROXY_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_PROXY_PROXY_API_H_
 
 #include <string>
 
 #include "base/memory/singleton.h"
 #include "base/string16.h"
 #include "chrome/browser/extensions/extension_preference_api.h"
 #include "chrome/browser/prefs/proxy_prefs.h"
 
-class ExtensionEventRouterForwarder;
-
 namespace base {
 class Value;
 }
 
 namespace extensions {
+class EventRouterForwarder;
 
 // Class to convert between the representation of proxy settings used
 // in the Proxy Settings API and the representation used in the PrefStores.
 // This plugs into the ExtensionPreferenceAPI to get and set proxy settings.
 class ProxyPrefTransformer : public PrefTransformerInterface {
  public:
   ProxyPrefTransformer();
   virtual ~ProxyPrefTransformer();
 
   // Implementation of PrefTransformerInterface.
   virtual base::Value* ExtensionToBrowserPref(const base::Value* extension_pref,
                                               std::string* error,
                                               bool* bad_message) OVERRIDE;
   virtual base::Value* BrowserToExtensionPref(
       const base::Value* browser_pref) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ProxyPrefTransformer);
 };
 
 // This class observes proxy error events and routes them to the appropriate
 // extensions listening to those events. All methods must be called on the IO
 // thread unless otherwise specified.
 class ProxyEventRouter {
  public:
   static ProxyEventRouter* GetInstance();
 
-  void OnProxyError(ExtensionEventRouterForwarder* event_router,
+  void OnProxyError(EventRouterForwarder* event_router,
                     void* profile,
                     int error_code);
 
-  void OnPACScriptError(ExtensionEventRouterForwarder* event_router,
+  void OnPACScriptError(EventRouterForwarder* event_router,
                         void* profile,
                         int line_number,
                         const string16& error);
 
  private:
   friend struct DefaultSingletonTraits<ProxyEventRouter>;
 
   ProxyEventRouter();
   ~ProxyEventRouter();
 
   DISALLOW_COPY_AND_ASSIGN(ProxyEventRouter);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PROXY_PROXY_API_H_