aura: Allow delegated frames to be used by more than one impl layer.

ui/compositor/layer.h

 // Copyright (c) 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 UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 15 matching lines @@
 #include "ui/compositor/layer_delegate.h"
 #include "ui/compositor/layer_type.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/transform.h"
 
 class SkCanvas;
 
 namespace cc {
 class ContentLayer;
 class CopyOutputRequest;
-class DelegatedFrameData;
+class DelegatedFrameProvider;
 class DelegatedRendererLayer;
 class Layer;
 class ResourceUpdateQueue;
 class SolidColorLayer;
 class TextureLayer;
 struct ReturnedResource;
 typedef std::vector<ReturnedResource> ReturnedResourceArray;
 }
 
 namespace ui {
@@ skipping 207 matching lines @@
   void SetExternalTexture(ui::Texture* texture);
   ui::Texture* external_texture() { return texture_.get(); }
 
   // Set new TextureMailbox for this layer. Note that |mailbox| may hold a
   // shared memory resource or an actual mailbox for a texture.
   void SetTextureMailbox(const cc::TextureMailbox& mailbox,
                          scoped_ptr<cc::SingleReleaseCallback> release_callback,
                          float scale_factor);
   cc::TextureMailbox GetTextureMailbox(float* scale_factor);
 
-  // Sets a delegated frame, coming from a child compositor.
-  void SetDelegatedFrame(scoped_ptr<cc::DelegatedFrameData> frame,
-                         gfx::Size frame_size_in_dip);
+  // Begins showing delegated frames from the |frame_provider|.
+  void SetShowDelegatedContent(cc::DelegatedFrameProvider* frame_provider,
+                               gfx::Size frame_size_in_dip);
 
   bool has_external_content() {
     return texture_layer_.get() || delegated_renderer_layer_.get();
   }
 
-  // Gets unused resources to recycle to the child compositor.
-  void TakeUnusedResourcesForChildCompositor(
-      cc::ReturnedResourceArray* array);
-
   void SetShowPaintedContent();
 
   // Sets the layer's fill color.  May only be called for LAYER_SOLID_COLOR.
   void SetColor(SkColor color);
 
   // Adds |invalid_rect| to the Layer's pending invalid rect and calls
   // ScheduleDraw(). Returns false if the paint request is ignored.
   bool SchedulePaint(const gfx::Rect& invalid_rect);
 
   // Schedules a redraw of the layer tree at the compositor.
@@ skipping 201 matching lines @@
 
   // A cached copy of |Compositor::device_scale_factor()|.
   float device_scale_factor_;
 
   // A cached copy of the TextureMailbox given texture_layer_.
   cc::TextureMailbox mailbox_;
 
   // Device scale factor in which mailbox_ was rendered in.
   float mailbox_scale_factor_;
 
-  // The size of the delegated frame in DIP, set when SetDelegatedFrame was
-  // called.
+  // The size of the delegated frame in DIP, set when SetShowDelegatedContent
+  // was called.
   gfx::Size delegated_frame_size_in_dip_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_