Add a path to use CALayers to display content

content/public/common/content_switches.cc

 // 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.
 
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 767 matching lines @@
 const char kDisablePanelFitting[]           = "disable-panel-fitting";
 #endif
 
 #if defined(OS_POSIX)
 // Causes the child processes to cleanly exit via calling exit().
 const char kChildCleanExit[]                = "child-clean-exit";
 #endif
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 const char kDisableCarbonInterposing[]      = "disable-carbon-interposing";
+
+// Use core animation to draw the RenderWidgetHostView on Mac.
+const char kUseCoreAnimation[]              = "use-core-animation";
 #endif
 
 // Disables the use of a 3D software rasterizer.
 const char kDisableSoftwareRasterizer[]     = "disable-software-rasterizer";
 
 #if defined(USE_AURA)
 // Forces usage of the test compositor. Needed to run ui tests on bots.
 extern const char kTestCompositor[]         = "test-compositor";
 #endif
 
@@ skipping 31 matching lines @@
 const char kOverscrollHistoryNavigation[] =
     "overscroll-history-navigation";
 
 // Forward overscroll event data from the renderer to the browser.
 const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications";
 
 // Enables 'image/webp' accept header for image requests.
 const char kEnableWebPInAcceptHeader[] = "enable-webp-in-accept-header";
 
 }  // namespace switches