refactor EnumerateDevices to make it a persistent request.

webkit/plugins/ppapi/mock_plugin_delegate.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 WEBKIT_PLUGINS_PPAPI_MOCK_PLUGIN_DELEGATE_H_
 #define WEBKIT_PLUGINS_PPAPI_MOCK_PLUGIN_DELEGATE_H_
 
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
 struct PP_NetAddress_Private;
@@ skipping 184 matching lines @@
   virtual void UnlockMouse(PluginInstance* instance);
   virtual bool IsMouseLocked(PluginInstance* instance);
   virtual void DidChangeCursor(PluginInstance* instance,
                                const WebKit::WebCursorInfo& cursor);
   virtual void DidReceiveMouseEvent(PluginInstance* instance);
   virtual void SampleGamepads(WebKit::WebGamepads* data) OVERRIDE;
   virtual bool IsInFullscreenMode();
   virtual bool IsPageVisible() const;
   virtual int EnumerateDevices(PP_DeviceType_Dev type,
                                const EnumerateDevicesCallback& callback);
+  virtual void StopEnumerateDevices(int request_id);
   virtual webkit_glue::ClipboardClient* CreateClipboardClient() const;
   virtual std::string GetDeviceID();
   virtual PP_FlashLSORestrictions GetLocalDataRestrictions(
       const GURL& document_url,
       const GURL& plugin_url);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_MOCK_PLUGIN_DELEGATE_H_