SetNeedsRedraw directly when updating a visible tile.

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 f5bea383141a38c325f695ed2247e9b7561331a9..1eba480213b85b106eff5ddbd9d6e5f766211379 100644
--- a/cc/resources/tile_manager.h
+++ b/cc/resources/tile_manager.h
@@ -60,6 +60,12 @@ class CC_EXPORT TileManagerClient {
   virtual void BuildRasterQueue(RasterTilePriorityQueue* queue,
                                 TreePriority tree_priority) = 0;
 
+  // Called when all tiles from the previous BuildRasterQueue have been

[vmpstr, 2014/10/31 15:46:30]

drive by nit: This isn't entirely true... It would be called when all tiles that
need to be processed under the currently memory policy have been processed. The
raster queue might still have tiles that are EVENTUALLY or something when we
have "prepaint only" policy. (to be clear, I think the code is correct it's just
the comment omits the fact that *handwave*memory policy*handwave*)

[danakj, 2014/10/31 15:47:30]

OK thanks I wasn't really sure what to write here, I tried :)

+  // processed. Each BuildRasterQueue call is followed by either another
+  // BuildRasterQueue call (when some tiles were processed but not all), or a
+  // FinishedRasterQueue() call.
+  virtual void FinishedRasterQueue() = 0;
+
   // Given an empty eviction tile priority queue, this will build a priority
   // queue that will return tiles in order in which they should be evicted.
   // Note if the queue was previous built, Reset must be called on it.
@@ -104,8 +110,7 @@ class CC_EXPORT TileManager : public RasterizerClient,
 
   void ManageTiles(const GlobalStateThatImpactsTilePriority& state);
 
-  // Returns true when visible tiles have been initialized.
-  bool UpdateVisibleTiles();
+  void UpdateVisibleTiles();
 
   scoped_refptr<Tile> CreateTile(RasterSource* raster_source,
                                  const gfx::Size& tile_size,
@@ -248,7 +253,6 @@ class CC_EXPORT TileManager : public RasterizerClient,
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
 
-  bool did_initialize_visible_tile_;
   bool did_check_for_completed_tasks_since_last_schedule_tasks_;
   bool did_oom_on_last_assign_;