Remove redundant signals_check_notifier_ schedule.

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 1202 matching lines @@
       global_state_.tree_priority,
       RasterTilePriorityQueue::Type::REQUIRED_FOR_ACTIVATION));
   bool need_to_signal_draw = MarkTilesOutOfMemory(client_->BuildRasterQueue(
       global_state_.tree_priority,
       RasterTilePriorityQueue::Type::REQUIRED_FOR_DRAW));
 
   // TODO(vmpstr): Temporary check to debug crbug.com/642927.
   CHECK(tile_task_manager_);
   DCHECK(IsReadyToActivate());
   DCHECK(IsReadyToDraw());
+  // Signals notifier is already scheduled above in the same function.
   signals_.ready_to_activate = need_to_signal_activate;
   signals_.ready_to_draw = need_to_signal_draw;
-  // TODO(ericrk): Investigate why we need to schedule this (not just call it
-  // inline). http://crbug.com/498439
-  signals_check_notifier_.Schedule();
 }
 
 bool TileManager::MarkTilesOutOfMemory(
     std::unique_ptr<RasterTilePriorityQueue> queue) const {
   // Mark required tiles as OOM so that we can activate/draw without them.
   if (queue->IsEmpty())
     return false;
 
   for (; !queue->IsEmpty(); queue->Pop()) {
     Tile* tile = queue->Top().tile();
@@ skipping 115 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