Add a flag to disable threaded scrolling

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1087 matching lines @@
     switches::kDisableLocalStorage,
     switches::kDisableLogging,
     switches::kDisableMediaSource,
     switches::kDisableOverlayScrollbar,
     switches::kDisablePinch,
     switches::kDisablePrefixedEncryptedMedia,
     switches::kDisableSeccompFilterSandbox,
     switches::kDisableSessionStorage,
     switches::kDisableSharedWorkers,
     switches::kDisableThreadedCompositing,
+    switches::kDisableThreadedScrolling,
     switches::kDisableTouchAdjustment,
     switches::kDisableTouchDragDrop,
     switches::kDisableTouchEditing,
     switches::kDisableV8IdleNotificationAfterCommit,
     switches::kDisableZeroCopy,
     switches::kDomAutomationController,
     switches::kEnableBeginFrameScheduling,
     switches::kEnableBleedingEdgeRenderingFastPaths,
     switches::kEnablePreferCompositingToLCDText,
     switches::kEnableCompositingForTransition,
@@ skipping 1117 matching lines @@
   if (worker_ref_count_ == 0)
     Cleanup();
 }
 
 void RenderProcessHostImpl::EnsureMojoActivated() {
   mojo_activation_required_ = true;
   MaybeActivateMojo();
 }
 
 }  // namespace content