Mac: Add command line flag to disable AVFoundation layers

ui/base/ui_base_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 "build/build_config.h"
 #include "ui/base/ui_base_switches.h"
 
 namespace switches {
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
+// Disable use of AVFoundation to draw video content.
+const char kDisableAVFoundationOverlays[] = "disable-avfoundation-overlays";
+
 // Fall back to using CAOpenGLLayers display content, instead of the IOSurface
 // based overlay display path.
 const char kDisableMacOverlays[] = "disable-mac-overlays";
 
 // Disable use of cross-process CALayers to display content directly from the
 // GPU process on Mac.
 const char kDisableRemoteCoreAnimation[] = "disable-remote-core-animation";
 
 // Show borders around CALayers corresponding to overlays and partial damage.
 const char kShowMacOverlayBorders[] = "show-mac-overlay-borders";
@@ skipping 55 matching lines @@
 // Use new window behavior for virtual keyboard (do not change work area in
 // non-sticky mode).
 const char kUseNewVirtualKeyboardBehavior[] =
     "use-new-virtual-keyboard-behavior";
 
 // Applies the material design mode passed via --top-chrome-md to elements
 // throughout Chrome (not just top Chrome).
 const char kExtendMdToSecondaryUi[] = "secondary-ui-md";
 
 }  // namespace switches