Turn on enable begin frame scheduling by default

ui/compositor/compositor.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 "ui/compositor/compositor.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <deque>
@@ skipping 370 matching lines @@
   host_->SetVisible(visible);
 }
 
 bool Compositor::IsVisible() {
   return host_->visible();
 }
 
 void Compositor::SetAuthoritativeVSyncInterval(
     const base::TimeDelta& interval) {
   context_factory_->SetAuthoritativeVSyncInterval(this, interval);
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-         cc::switches::kEnableBeginFrameScheduling)) {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+         cc::switches::kDisableBeginFrameScheduling)) {
     vsync_manager_->SetAuthoritativeVSyncInterval(interval);
   }
 }
 
 void Compositor::SetAcceleratedWidget(gfx::AcceleratedWidget widget) {
   // This function should only get called once.
   DCHECK(!widget_valid_);
   widget_ = widget;
   widget_valid_ = true;
   if (output_surface_requested_)
@@ skipping 155 matching lines @@
                     observer_list_,
                     OnCompositingLockStateChanged(this));
 }
 
 void Compositor::CancelCompositorLock() {
   if (compositor_lock_)
     compositor_lock_->CancelLock();
 }
 
 }  // namespace ui