Move remaining Blimp feature code to core.

blimp/client/core/contents/blimp_contents_view.h

 // Copyright 2016 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 BLIMP_CLIENT_CORE_CONTENTS_BLIMP_CONTENTS_VIEW_H_
 #define BLIMP_CLIENT_CORE_CONTENTS_BLIMP_CONTENTS_VIEW_H_
 
 #include <memory>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "ui/gfx/native_widget_types.h"
 
+namespace cc {
+class Layer;
+}  // namespace cc
+
 namespace blimp {
 namespace client {
 class BlimpContentsImpl;
 
 class BlimpContentsView {
  public:
   static std::unique_ptr<BlimpContentsView> Create(
-      BlimpContentsImpl* blimp_contents);
+      BlimpContentsImpl* blimp_contents,
+      scoped_refptr<cc::Layer> contents_layer);
 
   virtual ~BlimpContentsView() {}
 
   virtual gfx::NativeView GetNativeView() = 0;
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_CONTENTS_BLIMP_CONTENTS_VIEW_H_