Refactor PPB_Flash GetLocalTimeZoneOffset to the new PPAPI resource model

ppapi/proxy/flash_resource.h

Index: ppapi/proxy/flash_resource.h
diff --git a/ppapi/proxy/flash_resource.h b/ppapi/proxy/flash_resource.h
index f970aed86774a892bcb774abf9e1e9defebe0218..3bd0734d31a3540d512f7faa265c4141f556236d 100644
--- a/ppapi/proxy/flash_resource.h
+++ b/ppapi/proxy/flash_resource.h
@@ -33,6 +33,9 @@ class PPAPI_PROXY_EXPORT FlashResource
   virtual PP_Bool SetCrashData(PP_Instance instance,
                                PP_FlashCrashKey key,
                                PP_Var value) OVERRIDE;
+  virtual double GetLocalTimeZoneOffset(PP_Instance instance,
+                                        PP_Time t) OVERRIDE;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(FlashResource);
 };