CC Animations: Make LayerAnimationController creation optional

cc/blink/web_layer_impl.h

 // 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.
 
 #ifndef CC_BLINK_WEB_LAYER_IMPL_H_
 #define CC_BLINK_WEB_LAYER_IMPL_H_
 
 #include <string>
 #include <utility>
 
@@ skipping 21 matching lines @@
 }
 
 namespace base {
 namespace trace_event {
 class ConvertableToTraceFormat;
 }
 }
 
 namespace cc {
 class Layer;
+class LayerSettings;
 }
 
 namespace cc_blink {
 
 class WebToCCAnimationDelegateAdapter;
 
 class WebLayerImpl : public blink::WebLayer, public cc::LayerClient {
  public:
   CC_BLINK_EXPORT WebLayerImpl();
   CC_BLINK_EXPORT explicit WebLayerImpl(scoped_refptr<cc::Layer>);
   virtual ~WebLayerImpl();
 
   static bool UsingPictureLayer();
   CC_BLINK_EXPORT static void SetImplSidePaintingEnabled(bool enabled);
 
+  CC_BLINK_EXPORT static void SetLayerSettings(
+      const cc::LayerSettings& settings);
+  CC_BLINK_EXPORT static cc::LayerSettings& LayerSettings();
+
   CC_BLINK_EXPORT cc::Layer* layer() const;
 
   // WebLayer implementation.
   virtual int id() const;
   virtual void invalidateRect(const blink::WebRect&);
   virtual void invalidate();
   virtual void addChild(blink::WebLayer* child);
   virtual void insertChild(blink::WebLayer* child, size_t index);
   virtual void replaceChild(blink::WebLayer* reference,
                             blink::WebLayer* new_layer);
@@ skipping 85 matching lines @@
 
  private:
   scoped_ptr<WebToCCAnimationDelegateAdapter> animation_delegate_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(WebLayerImpl);
 };
 
 }  // namespace cc_blink
 
 #endif  // CC_BLINK_WEB_LAYER_IMPL_H_