cc: Remove some unnecessary const scoped_refptr&.

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 248 matching lines @@
                     base::saturated_cast<int>(stats.canceled_count));
   return std::move(state);
 }
 
 // static
 scoped_ptr<TileManager> TileManager::Create(
     TileManagerClient* client,
     base::SequencedTaskRunner* task_runner,
     size_t scheduled_raster_task_limit,
     bool use_partial_raster) {
+  // TODO(vmpstr): |task_runner| is a raw pointer that is implicitly converted
+  // into a scoped_refptr. Figure out whether to plumb a ref pointer or whether
+  // tile manager can have a non-owning pointer and fix.
   return make_scoped_ptr(new TileManager(
       client, task_runner, scheduled_raster_task_limit, use_partial_raster));
 }
 
-TileManager::TileManager(
-    TileManagerClient* client,
-    const scoped_refptr<base::SequencedTaskRunner>& task_runner,
-    size_t scheduled_raster_task_limit,
-    bool use_partial_raster)
+TileManager::TileManager(TileManagerClient* client,
+                         scoped_refptr<base::SequencedTaskRunner> task_runner,
+                         size_t scheduled_raster_task_limit,
+                         bool use_partial_raster)
     : client_(client),
-      task_runner_(task_runner),
+      task_runner_(std::move(task_runner)),
       resource_pool_(nullptr),
       tile_task_runner_(nullptr),
       scheduled_raster_task_limit_(scheduled_raster_task_limit),
       use_partial_raster_(use_partial_raster),
       use_gpu_rasterization_(false),
       all_tiles_that_need_to_be_rasterized_are_scheduled_(true),
       did_check_for_completed_tasks_since_last_schedule_tasks_(true),
       did_oom_on_last_assign_(false),
       more_tiles_need_prepare_check_notifier_(
           task_runner_.get(),
@@ skipping 903 matching lines @@
 void TileManager::Signals::reset() {
   ready_to_activate = false;
   did_notify_ready_to_activate = false;
   ready_to_draw = false;
   did_notify_ready_to_draw = false;
   all_tile_tasks_completed = false;
   did_notify_all_tile_tasks_completed = false;
 }
 
 }  // namespace cc