WIP: Propagate SurfaceID up window tree hierarchy

cc/trees/layer_tree_host.h

 // Copyright 2016 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_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/micro_benchmark.h"
 #include "cc/input/top_controls_state.h"
 
 namespace base {
 class TimeTicks;
 }  // namespace base
 
 namespace gfx {
 class Rect;
 }  // namespace gfx
 
 namespace cc {
+class FrameSinkId;
 class InputHandler;
 class LayerTree;
 class LayerTreeDebugState;
 class LayerTreeMutator;
 class LayerTreeSettings;
 class CompositorFrameSink;
 class SurfaceSequenceGenerator;
 class SwapPromise;
 class SwapPromiseManager;
 class TaskRunnerProvider;
@@ skipping 25 matching lines @@
 
   // Returns the TaskRunnerProvider used to access the main and compositor
   // thread task runners.
   virtual TaskRunnerProvider* GetTaskRunnerProvider() const = 0;
 
   // Returns the settings used by this host.
   virtual const LayerTreeSettings& GetSettings() const = 0;
 
   // Sets the client id used to generate the SurfaceId that uniquely identifies
   // the Surfaces produced by this compositor.
-  virtual void SetSurfaceClientId(uint32_t client_id) = 0;
+  virtual void SetFrameSinkId(const FrameSinkId& frame_sink_id) = 0;
 
   // Sets the LayerTreeMutator interface used to directly mutate the compositor
   // state on the compositor thread. (Compositor-Worker)
   virtual void SetLayerTreeMutator(
       std::unique_ptr<LayerTreeMutator> mutator) = 0;
 
   // Call this function when you expect there to be a swap buffer.
   // See swap_promise.h for how to use SwapPromise.
   virtual void QueueSwapPromise(std::unique_ptr<SwapPromise> swap_promise) = 0;
 
@@ skipping 118 matching lines @@
   virtual void SetNextCommitWaitsForActivation() = 0;
 
   // The LayerTreeHost tracks whether the content is suitable for Gpu raster.
   // Calling this will reset it back to not suitable state.
   virtual void ResetGpuRasterizationTracking() = 0;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_