Pass Callback to TaskRunner by value and consume it on invocation (1)

third_party/WebKit/Source/platform/scheduler/child/compositor_worker_scheduler.cc

 // Copyright 2016 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 "public/platform/scheduler/child/compositor_worker_scheduler.h"
 
+#include <utility>
+
+#include "base/callback.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 
 namespace blink {
 namespace scheduler {
 
 // TODO(scheduler-dev): Get rid of this asap!
 namespace {
 class CompositorWorkerTaskRunnerWrapper : public TaskQueue {
  public:
   explicit CompositorWorkerTaskRunnerWrapper(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner)
       : task_runner_(task_runner) {}
 
   // TaskQueue implementation:
   void UnregisterTaskQueue() override { NOTREACHED(); }
 
   bool RunsTasksOnCurrentThread() const override {
     return task_runner_->RunsTasksOnCurrentThread();
   }
 
   bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       const base::Closure& task,
+                       base::Closure task,
                        base::TimeDelta delay) override {
-    return task_runner_->PostDelayedTask(from_here, task, delay);
+    return task_runner_->PostDelayedTask(from_here, std::move(task), delay);
   }
 
   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
-                                  const base::Closure& task,
+                                  base::Closure task,
                                   base::TimeDelta delay) override {
-    return task_runner_->PostNonNestableDelayedTask(from_here, task, delay);
+    return task_runner_->PostNonNestableDelayedTask(from_here, std::move(task),
+                                                    delay);
   }
 
   std::unique_ptr<QueueEnabledVoter> CreateQueueEnabledVoter() override {
     NOTREACHED();
     return nullptr;
   }
 
   void InsertFence(InsertFencePosition position) override { NOTREACHED(); }
 
   void RemoveFence() override { NOTREACHED(); }
@@ skipping 126 matching lines @@
 }
 
 void CompositorWorkerScheduler::DidProcessIdleTask() {}
 
 base::TimeTicks CompositorWorkerScheduler::NowTicks() {
   return base::TimeTicks::Now();
 }
 
 }  // namespace scheduler
 }  // namespace blink