Mac: Remove white CALayers

chrome/browser/ui/cocoa/tab_contents/tab_contents_controller.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/tab_contents/tab_contents_controller.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 233 matching lines @@
                                  with:contentsNativeView];
   }
 
   [contentsNativeView setAutoresizingMask:NSViewNotSizable];
   [contentsContainer setFrame:[superview bounds]];
   [superview addSubview:contentsContainer];
   [contentsNativeView setAutoresizingMask:NSViewWidthSizable|
                                           NSViewHeightSizable];
 
   [contentsContainer setNeedsDisplay:YES];
-
-  // Push the background color down to the RenderWidgetHostView, so that if
-  // there is a flash between contents appearing, it will be the theme's color,
-  // not white.
-  SkColor skBackgroundColor = SK_ColorWHITE;
-  const ThemeProvider* theme = [[[self view] window] themeProvider];
-  if (theme)
-    skBackgroundColor = theme->GetColor(ThemeProperties::COLOR_NTP_BACKGROUND);
-  content::RenderWidgetHostView* rwhv = contents_->GetRenderWidgetHostView();
-  if (rwhv)
-    rwhv->SetBackgroundColor(skBackgroundColor);
 }
 
 - (void)updateFullscreenWidgetFrame {
   // This should only apply if a fullscreen widget is embedded.
   if (!isEmbeddingFullscreenWidget_ || blockFullscreenResize_)
     return;
 
   content::RenderWidgetHostView* const fullscreenView =
       contents_->GetFullscreenRenderWidgetHostView();
   if (fullscreenView) {
@@ skipping 114 matching lines @@
 
 - (BOOL)shouldResizeContentView {
   return !isEmbeddingFullscreenWidget_ || !blockFullscreenResize_;
 }
 
 - (BOOL)isPopup {
   return isPopup_;
 }
 
 @end