Mac: Remove flag to disable threaded event handling

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 {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
 // have an effect. 0 disables MSAA.
@@ skipping 934 matching lines @@
 // Linux speech service. Because it's buggy, the user must explicitly
 // enable it so that visiting a random webpage can't cause instability.
 const char kEnableSpeechDispatcher[] = "enable-speech-dispatcher";
 #endif
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 // 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";
-
-// Force all input events to be handled by Blink on thread. This will be removed
-// once compositor thread events have stuck.
-// http://crbug.com/138003
-extern const char kDisableThreadedEventHandlingMac[] =
-    "disable-threaded-event-handling-mac";
 #endif
 
 #if defined(OS_WIN)
 // Device scale factor passed to certain processes like renderers, etc.
 const char kDeviceScaleFactor[]     = "device-scale-factor";
 
 // Disable the Legacy Window which corresponds to the size of the WebContents.
 const char kDisableLegacyIntermediateWindow[] = "disable-legacy-window";
 
 // Enables or disables the Win32K process mitigation policy for renderer
@@ skipping 14 matching lines @@
 const char kEnableNpapi[]                   = "enable-npapi";
 
 #if defined(ENABLE_PLUGINS)
 // Enables the plugin power saver feature.
 const char kEnablePluginPowerSaver[] = "enable-plugin-power-saver";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches