[gtk] tabcontents fade-out for instant.

chrome/browser/renderer_host/render_widget_host_view_mac.mm

 // Copyright (c) 2010 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.
 
 #include <QuartzCore/QuartzCore.h>
 
 #include "chrome/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include "app/app_switches.h"
 #include "app/surface/io_surface_support_mac.h"
@@ skipping 1103 matching lines @@
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
 
   plugin_container_manager_.Draw(context, plugin_handle);
 }
 
 void RenderWidgetHostViewMac::ForceTextureReload() {
   plugin_container_manager_.ForceTextureReload();
 }
 
-void RenderWidgetHostViewMac::SetVisuallyDeemphasized(bool deemphasized) {
-  // Mac uses tab-modal sheets, so this is a no-op.
+void RenderWidgetHostViewMac::SetVisuallyDeemphasized(const SkColor* color,
+                                                      bool animate) {
+  // This is not used on mac.
 }
 
 void RenderWidgetHostViewMac::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }
 
 bool RenderWidgetHostViewMac::IsVoiceOverRunning() {
   NSUserDefaults* user_defaults = [NSUserDefaults standardUserDefaults];
@@ skipping 1542 matching lines @@
   if (!string) return NO;
 
   // If the user is currently using an IME, confirm the IME input,
   // and then insert the text from the service, the same as TextEdit and Safari.
   [self confirmComposition];
   [self insertText:string];
   return YES;
 }
 
 @end