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

third_party/WebKit/Source/modules/presentation/PresentationConnectionCallbacks.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 PresentationConnectionCallbacks_h
 #define PresentationConnectionCallbacks_h
 
 #include "platform/heap/Handle.h"
 #include "public/platform/WebCallbacks.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class PresentationRequest;
 class ScriptPromiseResolver;
 class WebPresentationConnectionClient;
 struct WebPresentationError;
 
 // PresentationConnectionCallbacks extends WebCallbacks to resolve the
 // underlying promise depending on the result passed to the callback. It takes
 // the PresentationRequest object that originated the call in its constructor
 // and will pass it to the created PresentationConnection.
 class PresentationConnectionCallbacks final
-    : public WebCallbacks<WebPassOwnPtr<WebPresentationConnectionClient>, const WebPresentationError&> {
+    : public WebCallbacks<std::unique_ptr<WebPresentationConnectionClient>, const WebPresentationError&> {
 public:
     PresentationConnectionCallbacks(ScriptPromiseResolver*, PresentationRequest*);
     ~PresentationConnectionCallbacks() override = default;
 
-    void onSuccess(WebPassOwnPtr<WebPresentationConnectionClient>) override;
+    void onSuccess(std::unique_ptr<WebPresentationConnectionClient>) override;
     void onError(const WebPresentationError&) override;
 
 private:
     Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<PresentationRequest> m_request;
 
     WTF_MAKE_NONCOPYABLE(PresentationConnectionCallbacks);
 };
 
 } // namespace blink
 
 #endif // PresentationConnectionCallbacks_h