Prototype: NativeLayer renderer with GL fallback

cc/output/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_RENDERER_H_
 #define CC_OUTPUT_RENDERER_H_
 
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_vector.h"
@@ skipping 37 matching lines @@
  public:
   virtual void SetFullRootLayerDamage() = 0;
 };
 
 class CC_EXPORT Renderer {
  public:
   virtual ~Renderer() {}
 
   virtual const RendererCapabilitiesImpl& Capabilities() const = 0;
 
+  virtual bool CanRender(const RenderPassList& render_passes) const;
   virtual void DecideRenderPassAllocationsForFrame(
       const RenderPassList& render_passes_in_draw_order) {}
   virtual bool HasAllocatedResourcesForTesting(RenderPassId id) const;
 
   // This passes ownership of the render passes to the renderer. It should
   // consume them, and empty the list. The parameters here may change from frame
   // to frame and should not be cached.
   // The |device_viewport_rect| and |device_clip_rect| are in non-y-flipped
   // window space.
   virtual void DrawFrame(RenderPassList* render_passes_in_draw_order,
@@ skipping 22 matching lines @@
   const RendererSettings* settings_;
   bool visible_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Renderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_RENDERER_H_