Enable accelerated animations for orphaned layers

cc/layer_tree_host.cc

 // Copyright 2011 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 "cc/layer_tree_host.h"
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
@@ skipping 72 matching lines @@
     , m_debugState(settings.initialDebugState)
     , m_deviceScaleFactor(1)
     , m_visible(true)
     , m_pageScaleFactor(1)
     , m_minPageScaleFactor(1)
     , m_maxPageScaleFactor(1)
     , m_triggerIdleUpdates(true)
     , m_backgroundColor(SK_ColorWHITE)
     , m_hasTransparentBackground(false)
     , m_partialTextureUpdateRequests(0)
-    , m_animationRegistrar(AnimationRegistrar::create())
 {
+    if (m_settings.acceleratedAnimationEnabled)
+        m_animationRegistrar = AnimationRegistrar::create();
     numLayerTreeInstances++;
 }
 
 bool LayerTreeHost::initialize(scoped_ptr<Thread> implThread)
 {
     if (implThread)
         return initializeProxy(ThreadProxy::create(this, implThread.Pass()));
     else
         return initializeProxy(SingleThreadProxy::create(this));
 }
@@ skipping 773 matching lines @@
     for (size_t childIndex = 0; childIndex < layer->children().size(); ++childIndex)
         setAnimationEventsRecursive(events, layer->children()[childIndex].get(), wallClockTime);
 }
 
 skia::RefPtr<SkPicture> LayerTreeHost::capturePicture()
 {
     return m_proxy->capturePicture();
 }
 
 }  // namespace cc