cc: Remove DelegatingRenderer.

cc/output/delegating_renderer.h

-// Copyright 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.
-
-#ifndef CC_OUTPUT_DELEGATING_RENDERER_H_
-#define CC_OUTPUT_DELEGATING_RENDERER_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "cc/base/cc_export.h"
-#include "cc/output/compositor_frame.h"
-
-namespace cc {
-class OutputSurface;
-class ResourceProvider;
-
-class CC_EXPORT DelegatingRenderer {
- public:
-  DelegatingRenderer(OutputSurface* output_surface,
-                     ResourceProvider* resource_provider);
-  ~DelegatingRenderer();
-
-  void DrawFrame(CompositorFrameMetadata metadata,
-                 RenderPassList render_passes_in_draw_order);
-
- private:
-  OutputSurface* const output_surface_;
-  ResourceProvider* const resource_provider_;
-
-  DISALLOW_COPY_AND_ASSIGN(DelegatingRenderer);
-};
-
-}  // namespace cc
-
-#endif  // CC_OUTPUT_DELEGATING_RENDERER_H_