Implement HiDPI support in Pepper dev interface

ppapi/thunk/resource_creation_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 PPAPI_THUNK_RESOURCE_CREATION_API_H_
 #define PPAPI_THUNK_RESOURCE_CREATION_API_H_
 
 #include "ppapi/c/dev/ppb_audio_input_dev.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/dev/ppb_video_layer_dev.h"
@@ skipping 103 matching lines @@
   virtual PP_Resource CreateFileChooser(
       PP_Instance instance,
       PP_FileChooserMode_Dev mode,
       const char* accept_types) = 0;
   virtual PP_Resource CreateFlashDeviceID(PP_Instance instance) = 0;
   virtual PP_Resource CreateFlashMenu(PP_Instance instance,
                                       const PP_Flash_Menu* menu_data) = 0;
   virtual PP_Resource CreateFlashMessageLoop(PP_Instance instance) = 0;
   virtual PP_Resource CreateGraphics2D(PP_Instance instance,
                                        const PP_Size& size,
-                                       PP_Bool is_always_opaque) = 0;
+                                       PP_Bool is_always_opaque,
+                                       float scale) = 0;
   virtual PP_Resource CreateGraphics3D(PP_Instance instance,
                                        PP_Resource share_context,
                                        const int32_t* attrib_list) = 0;
   virtual PP_Resource CreateGraphics3DRaw(PP_Instance instance,
                                           PP_Resource share_context,
                                           const int32_t* attrib_list) = 0;
   virtual PP_Resource CreateHostResolverPrivate(PP_Instance instance) = 0;
   virtual PP_Resource CreateNetworkMonitor(
       PP_Instance instance,
       PPB_NetworkMonitor_Callback callback,
@@ skipping 15 matching lines @@
   virtual PP_Resource CreateX509CertificatePrivate(PP_Instance instance) = 0;
 #endif  // !defined(OS_NACL)
 
   static const ApiID kApiID = API_ID_RESOURCE_CREATION;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_RESOURCE_CREATION_API_H_