cc: Remove resource freed tiles from tile manager pending gpu work set.

cc/tiles/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/tiles/tile_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 407 matching lines @@
   scheduled_raster_task_limit_ = scheduled_raster_task_limit;
   resource_pool_ = resource_pool;
   image_controller_.SetImageDecodeCache(image_decode_cache);
   tile_task_manager_ = TileTaskManagerImpl::Create(task_graph_runner);
   raster_buffer_provider_ = raster_buffer_provider;
 }
 
 void TileManager::Release(Tile* tile) {
   FreeResourcesForTile(tile);
   tiles_.erase(tile->id());
-  pending_gpu_work_tiles_.erase(tile);
 }
 
 void TileManager::DidFinishRunningTileTasksRequiredForActivation() {
   TRACE_EVENT0("cc",
                "TileManager::DidFinishRunningTileTasksRequiredForActivation");
   TRACE_EVENT_ASYNC_STEP_INTO1("cc", "ScheduledTasks", this, "running", "state",
                                ScheduledTasksStateAsValue());
   // TODO(vmpstr): Temporary check to debug crbug.com/642927.
   CHECK(tile_task_manager_);
   signals_.ready_to_activate = true;
@@ skipping 358 matching lines @@
                    "had_enough_memory_to_schedule_tiles_needed_now",
                    had_enough_memory_to_schedule_tiles_needed_now);
   return work_to_schedule;
 }
 
 void TileManager::FreeResourcesForTile(Tile* tile) {
   TileDrawInfo& draw_info = tile->draw_info();
   Resource* resource = draw_info.TakeResource();
   if (resource)
     resource_pool_->ReleaseResource(resource);
+  pending_gpu_work_tiles_.erase(tile);

[vmpstr, 2017/02/09 18:49:20]

nit: might as well make it a part of the if

[sunnyps, 2017/02/10 23:49:59]

Done. Also added a DCHECK in CheckPendingGpuWorkTiles.

 }
 
 void TileManager::FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(
     Tile* tile) {
   bool was_ready_to_draw = tile->draw_info().IsReadyToDraw();
   FreeResourcesForTile(tile);
   if (was_ready_to_draw)
     client_->NotifyTileStateChanged(tile);
 }
 
@@ skipping 638 matching lines @@
   all_tile_tasks_completed = false;
   did_notify_all_tile_tasks_completed = false;
 }
 
 TileManager::PrioritizedWorkToSchedule::PrioritizedWorkToSchedule() = default;
 TileManager::PrioritizedWorkToSchedule::PrioritizedWorkToSchedule(
     PrioritizedWorkToSchedule&& other) = default;
 TileManager::PrioritizedWorkToSchedule::~PrioritizedWorkToSchedule() = default;
 
 }  // namespace cc