diff --git content/browser/renderer_host/render_widget_host_view_mac.mm content/browser/renderer_host/render_widget_host_view_mac.mm
index 896170a..4beadf9 100644
--- content/browser/renderer_host/render_widget_host_view_mac.mm
+++ content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -453,9 +453,6 @@ RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget,
   // Paint this view host with |background_color_| when there is no content
   // ready to draw.
   background_layer_.reset([[CALayer alloc] init]);
-  // Set the default color to be white. This is the wrong thing to do, but many
-  // UI components expect this view to be opaque.
-  [background_layer_ setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
   [cocoa_view_ setLayer:background_layer_];
   [cocoa_view_ setWantsLayer:YES];