Add an --enable-container-culling commandline flag.

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"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 346 matching lines @@
     "enable-accelerated-overflow-scroll";
 
 // Enables LCD text.
 const char kEnableLCDText[]                 = "enable-lcd-text";
 
 // Enables experimental feature that maps multiple RenderLayers to
 // one composited layer to avoid pathological layer counts.
 const char kEnableLayerSquashing[] =
     "enable-layer-squashing";
 
+// Enable experimental container node culling.
+const char kEnableContainerCulling[]        = "enable-container-culling";
+
 // Turns on extremely verbose logging of accessibility events.
 const char kEnableAccessibilityLogging[]    = "enable-accessibility-logging";
 
 // Use a BeginImplFrame signal from browser to renderer to schedule rendering.
 const char kEnableBeginFrameScheduling[]    = "enable-begin-frame-scheduling";
 
 // Enables browser plugin for all types of pages.
 const char kEnableBrowserPluginForAllViewTypes[] =
     "enable-browser-plugin-for-all-view-types";
 
@@ skipping 659 matching lines @@
 
 // Disables support for Core Animation plugins. This is triggered when
 // accelerated compositing is disabled. See http://crbug.com/122430 .
 const char kDisableCoreAnimationPlugins[] =
     "disable-core-animation-plugins";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches