tracing: Make ConvertableToTraceFormat move-only scoped_ptr

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 235 matching lines @@
   const base::Closure on_task_set_finished_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskSetFinishedTaskImpl);
 };
 
 }  // namespace
 
 RasterTaskCompletionStats::RasterTaskCompletionStats()
     : completed_count(0u), canceled_count(0u) {}
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 RasterTaskCompletionStatsAsValue(const RasterTaskCompletionStats& stats) {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
+  auto state = make_scoped_ptr(new base::trace_event::TracedValue);
   state->SetInteger("completed_count",
                     base::saturated_cast<int>(stats.completed_count));
   state->SetInteger("canceled_count",
                     base::saturated_cast<int>(stats.canceled_count));
-  return state;
+  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) {
   return make_scoped_ptr(new TileManager(
       client, task_runner, scheduled_raster_task_limit, use_partial_raster));
@@ skipping 195 matching lines @@
 
   tile_task_runner_->CheckForCompletedTasks();
 
   did_check_for_completed_tasks_since_last_schedule_tasks_ = true;
 
   TRACE_EVENT_INSTANT1("cc", "DidFlush", TRACE_EVENT_SCOPE_THREAD, "stats",
                        RasterTaskCompletionStatsAsValue(flush_stats_));
   flush_stats_ = RasterTaskCompletionStats();
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 TileManager::BasicStateAsValue() const {
-  scoped_refptr<base::trace_event::TracedValue> value =
-      new base::trace_event::TracedValue();
+  auto value = make_scoped_ptr(new base::trace_event::TracedValue);
   BasicStateAsValueInto(value.get());
-  return value;
+  return std::move(value);
 }
 
 void TileManager::BasicStateAsValueInto(
     base::trace_event::TracedValue* state) const {
   state->SetInteger("tile_count", base::saturated_cast<int>(tiles_.size()));
   state->SetBoolean("did_oom_on_last_assign", did_oom_on_last_assign_);
   state->BeginDictionary("global_state");
   global_state_.AsValueInto(state);
   state->EndDictionary();
 }
@@ skipping 601 matching lines @@
 }
 
 ResourceFormat TileManager::DetermineResourceFormat(const Tile* tile) const {
   return tile_task_runner_->GetResourceFormat(!tile->is_opaque());
 }
 
 bool TileManager::DetermineResourceRequiresSwizzle(const Tile* tile) const {
   return tile_task_runner_->GetResourceRequiresSwizzle(!tile->is_opaque());
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 TileManager::ScheduledTasksStateAsValue() const {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
-
+  auto state = make_scoped_ptr(new base::trace_event::TracedValue);
   state->BeginDictionary("tasks_pending");
   state->SetBoolean("ready_to_activate", signals_.ready_to_activate);
   state->SetBoolean("ready_to_draw", signals_.ready_to_draw);
   state->SetBoolean("all_tile_tasks_completed",
                     signals_.all_tile_tasks_completed);
   state->EndDictionary();
-  return state;
+  return std::move(state);
 }
 
 // Utility function that can be used to create a "Task set finished" task that
 // posts |callback| to |task_runner| when run.
 scoped_refptr<TileTask> TileManager::CreateTaskSetFinishedTask(
     void (TileManager::*callback)()) {
   return make_scoped_refptr(new TaskSetFinishedTaskImpl(
       task_runner_.get(),
       base::Bind(callback, task_set_finished_weak_ptr_factory_.GetWeakPtr())));
 }
@@ skipping 68 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