Do not convert from RectF to Rect by flooring.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index e77101af10e533e53884a4708b963836c6874ba5..97874add46042c1087fae1c7b61968c79e2ef79f 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -1014,7 +1014,7 @@ bool PluginInstance::GetBitmapForOptimizedPluginPaint(
       0, 0, image_data->width(), image_data->height());
   float scale = GetBoundGraphics2D()->GetScale();
   gfx::Rect plugin_backing_store_rect =
-    pixel_plugin_backing_store_rect.Scale(scale);
+    pixel_plugin_backing_store_rect.ScaleUnsafe(scale);
 
   gfx::Rect clip_page = PP_ToGfxRect(view_data_.clip_rect);
   gfx::Rect plugin_paint_rect = plugin_backing_store_rect.Intersect(clip_page);