Add SetScale to PPB_WidgetDev, use scale for painting

ppapi/thunk/ppb_widget_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/thunk/thunk.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_widget_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
 namespace ppapi {
@@ skipping 26 matching lines @@
     return PP_FALSE;
   return enter.object()->GetLocation(location);
 }
 
 void SetLocation(PP_Resource widget, const PP_Rect* location) {
   EnterResource<PPB_Widget_API> enter(widget, false);
   if (enter.succeeded())
     enter.object()->SetLocation(location);
 }
 
-const PPB_Widget_Dev g_ppb_widget_thunk = {
+void SetScale(PP_Resource widget, float scale) {
+  EnterResource<PPB_Widget_API> enter(widget, false);
+  if (enter.succeeded())
+    enter.object()->SetScale(scale);
+}
+
+const PPB_Widget_Dev_0_3 g_ppb_widget_thunk_0_3 = {
   &IsWidget,
   &Paint,
   &HandleEvent,
   &GetLocation,
   &SetLocation,
 };
 
+const PPB_Widget_Dev_0_4 g_ppb_widget_thunk_0_4 = {
+  &IsWidget,
+  &Paint,
+  &HandleEvent,
+  &GetLocation,
+  &SetLocation,
+  &SetScale
+};
+
 }  // namespace
 
 const PPB_Widget_Dev_0_3* GetPPB_Widget_Dev_0_3_Thunk() {
-  return &g_ppb_widget_thunk;
+  return &g_ppb_widget_thunk_0_3;
+}
+
+const PPB_Widget_Dev_0_4* GetPPB_Widget_Dev_0_4_Thunk() {
+  return &g_ppb_widget_thunk_0_4;
 }
 
 }  // namespace thunk
 }  // namespace ppapi