Add SetScale to PPB_WidgetDev, use scale for painting

webkit/plugins/ppapi/ppb_widget_impl.cc

Index: webkit/plugins/ppapi/ppb_widget_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_widget_impl.cc b/webkit/plugins/ppapi/ppb_widget_impl.cc
index 306a1b565140cc679968fa1ddd913d3cca7ff188..8fe0386364663bac31ae3ca751aa18969bff2378 100644
--- a/webkit/plugins/ppapi/ppb_widget_impl.cc
+++ b/webkit/plugins/ppapi/ppb_widget_impl.cc
@@ -22,7 +22,8 @@ namespace webkit {
 namespace ppapi {
 
 PPB_Widget_Impl::PPB_Widget_Impl(PP_Instance instance)
-    : Resource(::ppapi::OBJECT_IS_IMPL, instance) {
+    : Resource(::ppapi::OBJECT_IS_IMPL, instance),
+      scale_(1.0f) {
   memset(&location_, 0, sizeof(location_));
 }
 
@@ -59,6 +60,10 @@ void PPB_Widget_Impl::SetLocation(const PP_Rect* location) {
   SetLocationInternal(location);
 }
 
+void PPB_Widget_Impl::SetScale(float scale) {
+  scale_ = scale;
+}
+
 void PPB_Widget_Impl::Invalidate(const PP_Rect* dirty) {
   PluginInstance* plugin_instance = ResourceHelper::GetPluginInstance(this);
   if (!plugin_instance)