gfx: Make conversions from Size to SizeF be explicit.

content/renderer/pepper/pepper_plugin_instance_impl.cc

Index: content/renderer/pepper/pepper_plugin_instance_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.cc b/content/renderer/pepper/pepper_plugin_instance_impl.cc
index 8a9d98553abea982d104307b179400b6c3c3990e..b4690b0d97ee85c7352984782cdb0a4e6347d7fd 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.cc
@@ -1523,7 +1523,7 @@ void PepperPluginInstanceImpl::UpdateLayerTransform() {
   // plugin to be rendered, then flickering behavior occurs as in
   // crbug.com/353453.
   gfx::SizeF graphics_2d_size_in_dip =
-      gfx::ScaleSize(bound_graphics_2d_platform_->Size(),
+      gfx::ScaleSize(gfx::SizeF(bound_graphics_2d_platform_->Size()),
                      bound_graphics_2d_platform_->GetScale());
   gfx::Size plugin_size_in_dip(view_data_.rect.size.width,
                                view_data_.rect.size.height);