cc: Add SwapPromiseManager and SurfaceSequenceGenerator.

cc/trees/layer_tree_host_interface.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_INTERFACE_H_
 #define CC_TREES_LAYER_TREE_HOST_INTERFACE_H_
 
 #include "base/macros.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 InputHandler;
 class LayerTree;
 class LayerTreeDebugState;
 class LayerTreeMutator;
 class LayerTreeSettings;
 class OutputSurface;
-class SwapPromiseMonitor;
+class SwapPromiseManager;
 class TaskRunnerProvider;
 class UIResourceManager;
 
 // TODO(khushalsagar): Will be renamed to LayerTreeHost.
 class CC_EXPORT LayerTreeHostInterface {
  public:
   virtual ~LayerTreeHostInterface() {}
 
   // Returns the process global unique identifier for this LayerTreeHost.
   virtual int GetId() const = 0;
 
   // The current source frame number. This is incremented for each main frame
   // update(commit) pushed to the compositor thread.
   virtual int SourceFrameNumber() const = 0;
 
   // Returns the LayerTree that holds the main frame state pushed to the
   // LayerTreeImpl on commit.
   virtual LayerTree* GetLayerTree() = 0;
   virtual const LayerTree* GetLayerTree() const = 0;
 
   // Returns the UIResourceManager used to create UIResources for
   // UIResourceLayers pushed to the LayerTree.
   virtual UIResourceManager* GetUIResourceManager() const = 0;
 
   // Returns the TaskRunnerProvider used to access the main and compositor
   // thread task runners.
   virtual TaskRunnerProvider* GetTaskRunnerProvider() const = 0;
 
+  // Returns the SwapPromiseManager used to queue SwapPromises to track the
+  // frame stages (commit, activation, SwapBuffers) performed by this
+  // LayerTreeHost. For a detailed explaination on how to use SwapPromises, see
+  // cc/output/swap_promise.h
+  virtual SwapPromiseManager* GetSwapPromiseManager() 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;
+  // Returns the SurfaceSequenceGenerator used to generate SurfaceSequences for
+  // Surfaces using CompositorFrames produced by this LayerTreeHost.
+  virtual SurfaceSequenceGenerator* GetSurfaceSequenceGenerator() = 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;
-
   // Sets whether the content is suitable to use Gpu Rasterization.
   virtual void SetHasGpuRasterizationTrigger(bool has_trigger) = 0;
 
   // Visibility and OutputSurface -------------------------------
 
   virtual void SetVisible(bool visible) = 0;
   virtual bool IsVisible() const = 0;
 
   // Called in response to an OutputSurface request made to the client using
   // LayerTreeHostClient::RequestNewOutputSurface. The client will be informed
@@ skipping 84 matching lines @@
   // Returns the id of the benchmark on success, 0 otherwise.
   virtual int ScheduleMicroBenchmark(
       const std::string& benchmark_name,
       std::unique_ptr<base::Value> value,
       const MicroBenchmark::DoneCallback& callback) = 0;
 
   // Returns true if the message was successfully delivered and handled.
   virtual bool SendMessageToMicroBenchmark(
       int id,
       std::unique_ptr<base::Value> value) = 0;
-
-  // Methods used internally in cc. These are not intended to be a part of the
-  // public API for use by the embedder ----------------------
-
-  // When a SwapPromiseMonitor is created on the main thread, it calls
-  // InsertSwapPromiseMonitor() to register itself with LayerTreeHost.
-  // When the monitor is destroyed, it calls RemoveSwapPromiseMonitor()
-  // to unregister itself.
-  virtual void InsertSwapPromiseMonitor(SwapPromiseMonitor* monitor) = 0;
-  virtual void RemoveSwapPromiseMonitor(SwapPromiseMonitor* monitor) = 0;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_INTERFACE_H_