Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/WebThreadSupportingGC.h

 // Copyright 2014 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 WebThreadSupportingGC_h
 #define WebThreadSupportingGC_h
 
 #include "platform/heap/GCTaskRunner.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebTaskRunner.h"
 #include "public/platform/WebThread.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
-#include <memory>
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 // WebThreadSupportingGC wraps a WebThread and adds support for attaching
 // to and detaching from the Blink GC infrastructure. The initialize method
 // must be called during initialization on the WebThread and before the
 // thread allocates any objects managed by the Blink GC. The shutdown
 // method must be called on the WebThread during shutdown when the thread
 // no longer needs to access objects managed by the Blink GC.
 //
 // WebThreadSupportingGC usually internally creates and owns WebThread unless
 // an existing WebThread is given via createForThread.
 class PLATFORM_EXPORT WebThreadSupportingGC final {
     USING_FAST_MALLOC(WebThreadSupportingGC);
     WTF_MAKE_NONCOPYABLE(WebThreadSupportingGC);
 public:
-    static std::unique_ptr<WebThreadSupportingGC> create(const char* name, bool perThreadHeapEnabled = false);
-    static std::unique_ptr<WebThreadSupportingGC> createForThread(WebThread*, bool perThreadHeapEnabled = false);
+    static PassOwnPtr<WebThreadSupportingGC> create(const char* name, bool perThreadHeapEnabled = false);
+    static PassOwnPtr<WebThreadSupportingGC> createForThread(WebThread*, bool perThreadHeapEnabled = false);
     ~WebThreadSupportingGC();
 
     void postTask(const WebTraceLocation& location, std::unique_ptr<SameThreadClosure> task)
     {
         m_thread->getWebTaskRunner()->postTask(location, std::move(task));
     }
 
     void postDelayedTask(const WebTraceLocation& location, std::unique_ptr<SameThreadClosure> task, long long delayMs)
     {
         m_thread->getWebTaskRunner()->postDelayedTask(location, std::move(task), delayMs);
@@ skipping 29 matching lines @@
 
     WebThread& platformThread() const
     {
         ASSERT(m_thread);
         return *m_thread;
     }
 
 private:
     WebThreadSupportingGC(const char* name, WebThread*, bool perThreadHeapEnabled);
 
-    std::unique_ptr<GCTaskRunner> m_gcTaskRunner;
+    OwnPtr<GCTaskRunner> m_gcTaskRunner;
 
     // m_thread is guaranteed to be non-null after this instance is constructed.
     // m_owningThread is non-null unless this instance is constructed for an
     // existing thread via createForThread().
     WebThread* m_thread = nullptr;
-    std::unique_ptr<WebThread> m_owningThread;
+    OwnPtr<WebThread> m_owningThread;
     bool m_perThreadHeapEnabled;
 };
 
 } // namespace blink
 
 #endif