cc: GPU rasterize tiles synchronously in PrepareToDraw.

cc/resources/tile_manager.h

Index: cc/resources/tile_manager.h
diff --git a/cc/resources/tile_manager.h b/cc/resources/tile_manager.h
index 7a1e4609e0e469fa7d546cc9aff95d7ca4f64b54..5897a225e2a338e9fc96d46a125b8839e2e3298d 100644
--- a/cc/resources/tile_manager.h
+++ b/cc/resources/tile_manager.h
@@ -34,6 +34,7 @@ class TracedValue;
 
 namespace cc {
 class PictureLayerImpl;
+class Rasterizer;
 class ResourceProvider;
 
 class CC_EXPORT TileManagerClient {
@@ -96,12 +97,12 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
     // rasterizer.h
   };
 
-  static scoped_ptr<TileManager> Create(
-      TileManagerClient* client,
-      base::SequencedTaskRunner* task_runner,
-      ResourcePool* resource_pool,
-      TileTaskRunner* tile_task_runner,
-      size_t scheduled_raster_task_limit);
+  static scoped_ptr<TileManager> Create(TileManagerClient* client,
+                                        base::SequencedTaskRunner* task_runner,
+                                        ResourcePool* resource_pool,
+                                        TileTaskRunner* tile_task_runner,
+                                        Rasterizer* rasterizer,
+                                        size_t scheduled_raster_task_limit);
   ~TileManager() override;
 
   // Assigns tile memory and schedules work to prepare tiles for drawing.
@@ -111,7 +112,7 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
   // prepared, or failed to prepare due to OOM.
   void PrepareTiles(const GlobalStateThatImpactsTilePriority& state);
 
-  void UpdateVisibleTiles();
+  void UpdateVisibleTiles(const GlobalStateThatImpactsTilePriority& state);
 
   scoped_refptr<Tile> CreateTile(RasterSource* raster_source,
                                  const gfx::Size& tile_size,
@@ -172,6 +173,7 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
               const scoped_refptr<base::SequencedTaskRunner>& task_runner,
               ResourcePool* resource_pool,
               TileTaskRunner* tile_task_runner,
+              Rasterizer* rasterizer,
               size_t scheduled_raster_task_limit);
 
   void FreeResourcesForReleasedTiles();
@@ -192,7 +194,12 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
   virtual void ScheduleTasks(
       const TileVector& tiles_that_need_to_be_rasterized);
 
-  void AssignGpuMemoryToTiles(TileVector* tiles_that_need_to_be_rasterized);
+  void AssignGpuMemoryToTiles(TileVector* tiles_that_need_to_be_rasterized,
+                              size_t scheduled_raser_task_limit,
+                              bool required_for_draw_only);
+
+  void SynchronouslyRasterizeTiles(
+      const GlobalStateThatImpactsTilePriority& state);
 
  private:
   class MemoryUsage {
@@ -239,6 +246,8 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
   bool TilePriorityViolatesMemoryPolicy(const TilePriority& priority);
   bool IsReadyToActivate() const;
   bool IsReadyToDraw() const;
+  void NotifyReadyToActivate();
+  void NotifyReadyToDraw();
   void CheckIfReadyToActivate();
   void CheckIfReadyToDraw();
 
@@ -246,6 +255,7 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   ResourcePool* resource_pool_;
   TileTaskRunner* tile_task_runner_;
+  Rasterizer* rasterizer_;
   GlobalStateThatImpactsTilePriority global_state_;
   size_t scheduled_raster_task_limit_;
 
@@ -277,6 +287,8 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient,
 
   std::vector<scoped_refptr<RasterTask>> orphan_raster_tasks_;
 
+  UniqueNotifier ready_to_activate_notifier_;
+  UniqueNotifier ready_to_draw_notifier_;
   UniqueNotifier ready_to_activate_check_notifier_;
   UniqueNotifier ready_to_draw_check_notifier_;