cc: Add checker-imaging support to TileManager.

cc/tiles/tile_manager.h

Index: cc/tiles/tile_manager.h
diff --git a/cc/tiles/tile_manager.h b/cc/tiles/tile_manager.h
index f1a933e1f6344e01b24ae45cc07a2f6c5e1c2a3a..4d79fc4c0c8ded9ca726b2de555339a23378a4c7 100644
--- a/cc/tiles/tile_manager.h
+++ b/cc/tiles/tile_manager.h
@@ -21,6 +21,7 @@
 #include "cc/raster/raster_buffer_provider.h"
 #include "cc/resources/memory_history.h"
 #include "cc/resources/resource_pool.h"
+#include "cc/tiles/checker_image_tracker.h"
 #include "cc/tiles/decoded_image_tracker.h"
 #include "cc/tiles/eviction_tile_priority_queue.h"
 #include "cc/tiles/image_controller.h"
@@ -79,6 +80,11 @@ class CC_EXPORT TileManagerClient {
   // Requests the color space into which tiles should be rasterized.
   virtual gfx::ColorSpace GetTileColorSpace() const = 0;
 
+  // Requests that a pending tree be scheduled to invalidate content on the
+  // pending on active tree. This is currently used when tiles that are
+  // rasterized with missing images need to be invalidated.
+  virtual void RequestImplSideInvalidation() = 0;
+
  protected:
   virtual ~TileManagerClient() {}
 };
@@ -96,15 +102,16 @@ RasterTaskCompletionStatsAsValue(const RasterTaskCompletionStats& stats);
 // 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 : CheckerImageTrackerClient {
  public:
   TileManager(TileManagerClient* client,
               base::SequencedTaskRunner* origin_task_runner,
               scoped_refptr<base::SequencedTaskRunner> image_worker_task_runner,
               size_t scheduled_raster_task_limit,
               bool use_partial_raster,
-              bool check_tile_priority_inversion);
-  virtual ~TileManager();
+              bool check_tile_priority_inversion,
+              bool enable_checker_imaging);
+  ~TileManager() override;
 
   // Assigns tile memory and schedules work to prepare tiles for drawing.
   // - Runs client_->NotifyReadyToActivate() when all tiles required for
@@ -140,6 +147,9 @@ class CC_EXPORT TileManager {
   bool IsReadyToActivate() const;
   bool IsReadyToDraw() const;
 
+  void AddImplSideInvalidations(LayerTreeImpl* sync_tree);
+  void DidActivateSyncTree();
+
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
   BasicStateAsValue() const;
   void BasicStateAsValueInto(base::trace_event::TracedValue* dict) const;
@@ -212,6 +222,9 @@ class CC_EXPORT TileManager {
 
   void SetDecodedImageTracker(DecodedImageTracker* decoded_image_tracker);
 
+  // CheckerImageTrackerClient implementation.
+  void NeedsInvalidationForCheckerImagedTiles() override;
+
  protected:
   friend class Tile;
   // Must be called by tile during destruction.
@@ -321,6 +334,7 @@ class CC_EXPORT TileManager {
   bool did_oom_on_last_assign_;
 
   ImageController image_controller_;
+  CheckerImageTracker checker_image_tracker_;
 
   RasterTaskCompletionStats flush_stats_;