Refactor PPB_Flash GetLocalTimeZoneOffset to the new PPAPI resource model

ppapi/thunk/ppb_flash_thunk.cc

Index: ppapi/thunk/ppb_flash_thunk.cc
diff --git a/ppapi/thunk/ppb_flash_thunk.cc b/ppapi/thunk/ppb_flash_thunk.cc
index 9aac0ac9dbabd7b12596f0b06eca70f0104f0eff..1f809eb9265f6fdbd60be240c42a8c851b632e59 100644
--- a/ppapi/thunk/ppb_flash_thunk.cc
+++ b/ppapi/thunk/ppb_flash_thunk.cc
@@ -87,10 +87,10 @@ void QuitMessageLoop(PP_Instance instance) {
 }
 
 double GetLocalTimeZoneOffset(PP_Instance instance, PP_Time t) {
-  EnterInstance enter(instance);
+  EnterInstanceAPI<PPB_Flash_Functions_API> enter(instance);
   if (enter.failed())
     return 0.0;
-  return enter.functions()->GetFlashAPI()->GetLocalTimeZoneOffset(instance, t);
+  return enter.functions()->GetLocalTimeZoneOffset(instance, t);
 }
 
 PP_Var GetCommandLineArgs(PP_Module /* pp_module */) {