Rename CancellableTaskFactory::task() for clarity.

Source/platform/scheduler/CancellableTaskFactory.h

 // Copyright 2015 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.
 
 #ifndef CancellableTaskFactory_h
 #define CancellableTaskFactory_h
 
 #include "platform/PlatformExport.h"
 #include "public/platform/WebScheduler.h"
 #include "wtf/Functional.h"
@@ skipping 18 matching lines @@
 
     bool isPending() const
     {
         return m_weakPtrFactory.hasWeakPtrs();
     }
 
     void cancel();
 
     // Returns a task that can be disabled by calling cancel().  The user takes
     // ownership of the task.  Creating a new task cancels any previous ones.
-    WebThread::Task* task();
+    WebThread::Task* cancelAndCreate();
 
 private:
     class CancellableTask : public WebThread::Task {
         WTF_MAKE_NONCOPYABLE(CancellableTask);
 
     public:
         explicit CancellableTask(WeakPtr<CancellableTaskFactory> weakPtr)
             : m_weakPtr(weakPtr) { }
 
         virtual ~CancellableTask() { }
 
         void run() override;
 
     private:
         WeakPtr<CancellableTaskFactory> m_weakPtr;
     };
 
     OwnPtr<Closure> m_closure;
     WeakPtrFactory<CancellableTaskFactory> m_weakPtrFactory;
 };
 
 } // namespace blink
 
 #endif // CancellableTaskFactory_h