Refactor PPB_Flash_Fullscreen to the new resource model.

ppapi/thunk/ppb_flash_fullscreen_thunk.cc

 // 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.
 
 #include "ppapi/c/ppb_fullscreen.h"
 #include "ppapi/c/private/ppb_flash_fullscreen.h"
 #include "ppapi/thunk/thunk.h"
 #include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_flash_fullscreen_api.h"
 #include "ppapi/thunk/ppb_instance_api.h"
-#include "ppapi/thunk/ppb_flash_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
 namespace ppapi {
 namespace thunk {
 
 namespace {
 
 PP_Bool IsFullscreen(PP_Instance instance) {
-  EnterInstance enter(instance);
+  EnterInstanceAPI<PPB_Flash_Fullscreen_API> enter(instance);
   if (enter.failed())
     return PP_FALSE;
-  return enter.functions()->GetFlashAPI()->FlashIsFullscreen(instance);
+  return enter.functions()->IsFullscreen(instance);
 }
 
 PP_Bool SetFullscreen(PP_Instance instance, PP_Bool fullscreen) {
-  EnterInstance enter(instance);
+  EnterInstanceAPI<PPB_Flash_Fullscreen_API> enter(instance);
   if (enter.failed())
     return PP_FALSE;
-  return enter.functions()->GetFlashAPI()->FlashSetFullscreen(instance,
-                                                              fullscreen);
+  return enter.functions()->SetFullscreen(instance, fullscreen);
 }
 
+// TODO(raymes): The codepaths for GetScreenSize in PPB_Fullscreen and
+// PPB_Flash_Fullscreen are the same. Consider deprecating the flash version.
 PP_Bool GetScreenSize(PP_Instance instance, PP_Size* size) {
   EnterInstance enter(instance);
   if (enter.failed())
     return PP_FALSE;
-  return enter.functions()->GetFlashAPI()->FlashGetScreenSize(instance, size);
+  return enter.functions()->GetScreenSize(instance, size);
 }
 
 const PPB_FlashFullscreen_0_1 g_ppb_flash_fullscreen_thunk = {
   &IsFullscreen,
   &SetFullscreen,
   &GetScreenSize
 };
 
 }  // namespace
 
 const PPB_FlashFullscreen_0_1* GetPPB_FlashFullscreen_0_1_Thunk() {
   return &g_ppb_flash_fullscreen_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi