Nuke WebPassOwnPtr<T> and replace it with std::unique_ptr<T>.

content/child/service_worker/web_service_worker_registration_impl.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 CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_REGISTRATION_IMPL_H_
 #define CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_REGISTRATION_IMPL_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 45 matching lines @@
   void unregister(blink::WebServiceWorkerProvider* provider,
                   WebServiceWorkerUnregistrationCallbacks* callbacks) override;
 
   int64_t registration_id() const;
 
   using WebServiceWorkerRegistrationHandle =
       blink::WebServiceWorkerRegistration::Handle;
 
   // Creates WebServiceWorkerRegistrationHandle object that owns a reference to
   // the given WebServiceWorkerRegistrationImpl object.
-  static blink::WebPassOwnPtr<WebServiceWorkerRegistrationHandle> CreateHandle(
+  static std::unique_ptr<WebServiceWorkerRegistrationHandle> CreateHandle(
       const scoped_refptr<WebServiceWorkerRegistrationImpl>& registration);
 
   // Same with CreateHandle(), but returns a raw pointer to the handle w/ its
   // ownership instead. The caller must manage the ownership. This function must
   // be used only for passing the handle to Blink API that does not support
   // blink::WebPassOwnPtr.
   static WebServiceWorkerRegistrationHandle* CreateLeakyHandle(
       const scoped_refptr<WebServiceWorkerRegistrationImpl>& registration);
 
  private:
@@ skipping 22 matching lines @@
   blink::WebServiceWorkerRegistrationProxy* proxy_;
 
   std::vector<QueuedTask> queued_tasks_;
 
   DISALLOW_COPY_AND_ASSIGN(WebServiceWorkerRegistrationImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_REGISTRATION_IMPL_H_