cc: Give ownership of render passes to the renderer when drawing a frame.

cc/layer_tree_host_impl.h

 // Copyright 2011 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_LAYER_TREE_HOST_IMPL_H_
 #define CC_LAYER_TREE_HOST_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 140 matching lines @@
     virtual void commitComplete();
     virtual void animate(base::TimeTicks monotonicTime, base::Time wallClockTime);
 
     void manageTiles();
 
     // Returns false if problems occured preparing the frame, and we should try
     // to avoid displaying the frame. If prepareToDraw is called,
     // didDrawAllLayers must also be called, regardless of whether drawLayers is
     // called between the two.
     virtual bool prepareToDraw(FrameData&);
-    virtual void drawLayers(const FrameData&);
+    virtual void drawLayers(FrameData&);
     // Must be called if and only if prepareToDraw was called.
     void didDrawAllLayers(const FrameData&);
 
     // RendererClient implementation
     virtual const gfx::Size& deviceViewportSize() const OVERRIDE;
     virtual const LayerTreeSettings& settings() const OVERRIDE;
     virtual void didLoseContext() OVERRIDE;
     virtual void onSwapBuffersComplete() OVERRIDE;
     virtual void setFullRootLayerDamage() OVERRIDE;
     virtual void setManagedMemoryPolicy(const ManagedMemoryPolicy& policy) OVERRIDE;
@@ skipping 208 matching lines @@
     size_t m_numMainThreadScrolls;
 
     size_t m_cumulativeNumLayersDrawn;
 
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_IMPL_H_