cc: Support on demand raster with ganesh

cc/trees/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_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 211 matching lines @@
   gfx::Size DrawViewportSize() const;
 
   // Viewport size for scrolling and fixed-position compensation. This value
   // excludes the URL bar and non-overlay scrollbars and is in DIP (and
   // invariant relative to page scale).
   gfx::SizeF UnscaledScrollableViewportSize() const;
   float VerticalAdjust() const;
 
   // RendererClient implementation.
   virtual void SetFullRootLayerDamage() OVERRIDE;
+  virtual void RunOnDemandRasterTask(Task* on_demand_raster_task) OVERRIDE;
 
   // TileManagerClient implementation.
   virtual const std::vector<PictureLayerImpl*>& GetPictureLayers() OVERRIDE;
   virtual void NotifyReadyToActivate() OVERRIDE;
   virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE;
 
   // ScrollbarAnimationControllerClient implementation.
   virtual void PostDelayedScrollbarFade(const base::Closure& start_fade,
                                         base::TimeDelta delay) OVERRIDE;
   virtual void SetNeedsScrollbarAnimationFrame() OVERRIDE;
@@ skipping 324 matching lines @@
   // |resource_provider_| and |tile_manager_| can be NULL, e.g. when using tile-
   // free rendering - see OutputSurface::ForcedDrawToSoftwareDevice().
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<TileManager> tile_manager_;
   bool use_gpu_rasterization_;
   scoped_ptr<RasterWorkerPool> raster_worker_pool_;
   scoped_ptr<ResourcePool> resource_pool_;
   scoped_ptr<ResourcePool> staging_resource_pool_;
   scoped_ptr<Renderer> renderer_;
 
+  scoped_ptr<TaskGraphRunner> synchronous_on_demand_task_graph_runner_;

[reveman, 2014/06/20 03:56:30]

you could just call it |synchronous_task_graph_runner_| if you like as there's
nothing that prevents it from being used for some other synchronous tasks in the
future.

+  TaskGraphRunner* on_demand_task_graph_runner_;
+  NamespaceToken on_demand_task_namespace_;
+
   GlobalStateThatImpactsTilePriority global_tile_state_;
 
   // Tree currently being drawn.
   scoped_ptr<LayerTreeImpl> active_tree_;
 
   // In impl-side painting mode, tree with possibly incomplete rasterized
   // content. May be promoted to active by ActivatePendingTree().
   scoped_ptr<LayerTreeImpl> pending_tree_;
 
   // In impl-side painting mode, inert tree with layers that can be recycled
@@ skipping 100 matching lines @@
   size_t transfer_buffer_memory_limit_;
 
   std::vector<PictureLayerImpl*> picture_layers_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_