Use layout test support flag to turn on single thread compositor proxy scheduler

content/public/common/content_switches.h

 // 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.
 
 // Defines all the "content" command-line switches.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 60 matching lines @@
 CONTENT_EXPORT extern const char kDisableOneCopy[];
 extern const char kDisablePepper3d[];
 CONTENT_EXPORT extern const char kDisablePinch[];
 CONTENT_EXPORT extern const char kDisablePluginsDiscovery[];
 CONTENT_EXPORT extern const char kDisableReadingFromCanvas[];
 extern const char kDisableRemoteFonts[];
 extern const char kDisableRendererAccessibility[];
 CONTENT_EXPORT extern const char kDisableSeccompFilterSandbox[];
 CONTENT_EXPORT extern const char kDisableSetuidSandbox[];
 CONTENT_EXPORT extern const char kDisableSharedWorkers[];
-CONTENT_EXPORT extern const char kDisableSingleThreadProxyScheduler[];
 CONTENT_EXPORT extern const char kDisableSmoothScrolling[];
 CONTENT_EXPORT extern const char kDisableSoftwareRasterizer[];
 CONTENT_EXPORT extern const char kDisableSVG1DOM[];
 CONTENT_EXPORT extern const char kDisableTextBlobs[];
 CONTENT_EXPORT extern const char kDisableThreadedCompositing[];
 CONTENT_EXPORT extern const char kDisableThreadedScrolling[];
 extern const char kDisableV8IdleTasks[];
 CONTENT_EXPORT extern const char kDisableWebSecurity[];
 extern const char kDisableXSSAuditor[];
 CONTENT_EXPORT extern const char kDomAutomationController[];
@@ skipping 209 matching lines @@
 #endif
 
 CONTENT_EXPORT extern const char kEnableNpapi[];
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_