Revert of Enable BeginFrame scheduling on aura

ui/compositor/compositor_vsync_manager.cc

+// Copyright 2014 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_vsync_manager.h"
+
+namespace ui {
+
+CompositorVSyncManager::CompositorVSyncManager()
+    : authoritative_vsync_interval_(base::TimeDelta::FromSeconds(0)) {
+}
+
+CompositorVSyncManager::~CompositorVSyncManager() {}
+
+void CompositorVSyncManager::SetAuthoritativeVSyncInterval(
+    base::TimeDelta interval) {
+  authoritative_vsync_interval_ = interval;
+  last_interval_ = interval;
+  NotifyObservers(last_timebase_, last_interval_);
+}
+
+void CompositorVSyncManager::UpdateVSyncParameters(base::TimeTicks timebase,
+                                                   base::TimeDelta interval) {
+  if (authoritative_vsync_interval_ != base::TimeDelta::FromSeconds(0))
+    interval = authoritative_vsync_interval_;
+  last_timebase_ = timebase;
+  last_interval_ = interval;
+  NotifyObservers(timebase, interval);
+}
+
+void CompositorVSyncManager::AddObserver(Observer* observer) {
+  observer_list_.AddObserver(observer);
+  observer->OnUpdateVSyncParameters(last_timebase_, last_interval_);
+}
+
+void CompositorVSyncManager::RemoveObserver(Observer* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+void CompositorVSyncManager::NotifyObservers(base::TimeTicks timebase,
+                                             base::TimeDelta interval) {
+  FOR_EACH_OBSERVER(CompositorVSyncManager::Observer, observer_list_,
+                    OnUpdateVSyncParameters(timebase, interval));
+}
+
+}  // namespace ui