cc: Always check for completed raster tasks before scheduling more tasks.

cc/resources/tile_manager.cc

 // Copyright 2012 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.
 
 #include "cc/resources/tile_manager.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 
@@ skipping 379 matching lines @@
                                   : mts.bin;
 
     // Insert the tile into a priority set.
     tiles->InsertTile(tile, priority_bin);
   }
 }
 
 void TileManager::ManageTiles() {
   TRACE_EVENT0("cc", "TileManager::ManageTiles");
 
+  raster_worker_pool_->CheckForCompletedTasks();

[vmpstr, 2013/09/18 20:39:36]

nit: Can you add a comment here, something similar to this CL description?

[reveman, 2013/09/18 21:48:30]

Done.

+
   TileVector tiles_that_need_to_be_rasterized;
   AssignGpuMemoryToTiles(GetPrioritizedTileSet(),
                          &tiles_that_need_to_be_rasterized);
 
   // Finally, schedule rasterizer tasks.
   ScheduleTasks(tiles_that_need_to_be_rasterized);
 
   TRACE_EVENT_INSTANT1(
       "cc", "DidManage", TRACE_EVENT_SCOPE_THREAD,
       "state", TracedValue::FromValue(BasicStateAsValue().release()));
@@ skipping 420 matching lines @@
     bytes_releasable_ += tile->bytes_consumed_if_allocated();
     ++resources_releasable_;
   }
 
   FreeUnusedResourcesForTile(tile);
   if (tile->priority(ACTIVE_TREE).distance_to_visible_in_pixels == 0)
     did_initialize_visible_tile_ = true;
 }
 
 }  // namespace cc