Fix content scaling bug on Mac

content/common/gpu/image_transport_surface_calayer_mac.mm

Index: content/common/gpu/image_transport_surface_calayer_mac.mm
diff --git a/content/common/gpu/image_transport_surface_calayer_mac.mm b/content/common/gpu/image_transport_surface_calayer_mac.mm
index c4d8ac8a4cfe9e0dadddc1ea0f354292355bc715..264b97f4a28eddac8216ba980f92291b139460a1 100644
--- a/content/common/gpu/image_transport_surface_calayer_mac.mm
+++ b/content/common/gpu/image_transport_surface_calayer_mac.mm
@@ -131,9 +131,6 @@ bool CALayerStorageProvider::AllocateColorBufferStorage(
   }
   glFlush();
 
-  // Disable the fade-in animation as the layer is changed.
-  ScopedCAActionDisabler disabler;
-
   // Set the parameters that will be used to allocate the CALayer to draw the
   // texture into.
   share_group_context_.reset(CGLRetainContext(context));