Allow switching DirectCompositionSurfaceWin between drawing modes.

cc/output/software_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_SOFTWARE_RENDERER_H_
 #define CC_OUTPUT_SOFTWARE_RENDERER_H_
 
 #include "base/macros.h"
 #include "cc/cc_export.h"
 #include "cc/output/direct_renderer.h"
@@ skipping 33 matching lines @@
   void PrepareSurfaceForPass(SurfaceInitializationMode initialization_mode,
                              const gfx::Rect& render_pass_scissor) override;
   void DoDrawQuad(const DrawQuad* quad, const gfx::QuadF* draw_region) override;
   void BeginDrawingFrame() override;
   void FinishDrawingFrame() override;
   bool FlippedFramebuffer() const override;
   void EnsureScissorTestEnabled() override;
   void EnsureScissorTestDisabled() override;
   void CopyCurrentRenderPassToBitmap(
       std::unique_ptr<CopyOutputRequest> request) override;
+  void SetEnableDCLayers(bool enable) override;
   void DidChangeVisibility() override;
 
  private:
   void ClearCanvas(SkColor color);
   void ClearFramebuffer();
   void SetClipRect(const gfx::Rect& rect);
   bool IsSoftwareResource(ResourceId resource_id) const;
 
   void DrawDebugBorderQuad(const DebugBorderDrawQuad* quad);
   void DrawPictureQuad(const PictureDrawQuad* quad);
@@ skipping 31 matching lines @@
   std::unique_ptr<ResourceProvider::ScopedWriteLockSoftware>
       current_framebuffer_lock_;
   std::unique_ptr<SkCanvas> current_framebuffer_canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(SoftwareRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SOFTWARE_RENDERER_H_