cc: Check for completed raster tasks at interval.

cc/tile_manager.h

Index: cc/tile_manager.h
diff --git a/cc/tile_manager.h b/cc/tile_manager.h
index d5590365d45fae7f57c20ad7c05f43d373daea4c..739fc6a975e4609c0ca2c48ff0b8cdcbbc82517a 100644
--- a/cc/tile_manager.h
+++ b/cc/tile_manager.h
@@ -16,6 +16,7 @@
 #include "cc/rendering_stats.h"
 #include "cc/resource_pool.h"
 #include "cc/tile_priority.h"
+#include "cc/worker_pool.h"
 
 namespace cc {
 class RasterWorkerPool;
@@ -26,7 +27,9 @@ class TileVersion;
 class CC_EXPORT TileManagerClient {
  public:
   virtual void ScheduleManageTiles() = 0;
+  virtual void ScheduleCheckForCompletedRasterTasks() = 0;
   virtual void DidUploadVisibleHighResolutionTile() = 0;
+  virtual void DidDetectIdleRaster() = 0;
 
  protected:
   virtual ~TileManagerClient() {}
@@ -95,7 +98,7 @@ class CC_EXPORT ManagedTileState {
 // should no longer have any memory assigned to them. Tile objects are "owned"
 // by layers; they automatically register with the manager when they are
 // created, and unregister from the manager when they are deleted.
-class CC_EXPORT TileManager {
+class CC_EXPORT TileManager : public WorkerPoolClient {
  public:
   TileManager(TileManagerClient* client,
               ResourceProvider *resource_provider,
@@ -109,6 +112,7 @@ class CC_EXPORT TileManager {
   void SetGlobalState(const GlobalStateThatImpactsTilePriority& state);
 
   void ManageTiles();
+  void CheckForCompletedRasterTasks();
   void CheckForCompletedTileUploads();
   void AbortPendingTileUploads();
 
@@ -123,6 +127,9 @@ class CC_EXPORT TileManager {
 
   const MemoryHistory::Entry& memory_stats_from_last_assign() const { return memory_stats_from_last_assign_; }
 
+  // Overridden from WorkerPoolClient:
+  virtual void OnIdle() OVERRIDE;
+
  protected:
   // Methods called by Tile
   friend class Tile;
@@ -205,10 +212,12 @@ class CC_EXPORT TileManager {
 
   typedef std::queue<scoped_refptr<Tile> > TileQueue;
   TileQueue tiles_with_pending_set_pixels_;
-  size_t bytes_pending_set_pixels_;
   bool ever_exceeded_memory_budget_;
   MemoryHistory::Entry memory_stats_from_last_assign_;
 
+  size_t bytes_pending_raster_;
+  size_t bytes_pending_set_pixels_;
+
   bool record_rendering_stats_;
   RenderingStats rendering_stats_;