[Offline pages] TaskQueue polishing

components/offline_pages/core/task_queue.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 "components/offline_pages/core/task_queue.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_task_runner_handle.h"
 
 namespace offline_pages {
 
 TaskQueue::TaskQueue() : weak_ptr_factory_(this) {}
 
 TaskQueue::~TaskQueue() {}
 
 void TaskQueue::AddTask(std::unique_ptr<Task> task) {
   task->SetTaskCompletionCallback(
       base::ThreadTaskRunnerHandle::Get(),
       base::Bind(&TaskQueue::TaskCompleted, weak_ptr_factory_.GetWeakPtr()));
   tasks_.push(std::move(task));
-  MaybeStartTask();
+  StartTaskIfAvailable();
 }
 
 bool TaskQueue::HasPendingTasks() const {
   return !tasks_.empty() || HasRunningTask();
 }
 
 bool TaskQueue::HasRunningTask() const {
   return current_task_.get() != nullptr;
 }
 
-void TaskQueue::MaybeStartTask() {
+void TaskQueue::StartTaskIfAvailable() {
   DVLOG(2) << "running? " << HasRunningTask() << ", pending? "
            << HasPendingTasks() << " " << __func__;
   if (HasRunningTask() || !HasPendingTasks())
     return;
 
   current_task_ = std::move(tasks_.front());
   tasks_.pop();
   current_task_->Run();
 }
 
 void TaskQueue::TaskCompleted(Task* task) {
   DCHECK_EQ(task, current_task_.get());
   if (task == current_task_.get()) {
     current_task_.reset(nullptr);
-    MaybeStartTask();
+    StartTaskIfAvailable();
   }
 }
 
 }  // namespace offline_pages