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

third_party/WebKit/Source/modules/webusb/USB.cpp

 // 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.
 
 #include "modules/webusb/USB.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
@@ skipping 125 matching lines @@
     return EventTargetNames::USB;
 }
 
 void USB::contextDestroyed()
 {
     if (m_client)
         m_client->removeObserver(this);
     m_client = nullptr;
 }
 
-void USB::onDeviceConnected(WebPassOwnPtr<WebUSBDevice> device)
+void USB::onDeviceConnected(std::unique_ptr<WebUSBDevice> device)
 {
-    dispatchEvent(USBConnectionEvent::create(EventTypeNames::connect, USBDevice::create(device.release(), getExecutionContext())));
+    dispatchEvent(USBConnectionEvent::create(EventTypeNames::connect, USBDevice::create(adoptPtr(device.release()), getExecutionContext())));
 }
 
-void USB::onDeviceDisconnected(WebPassOwnPtr<WebUSBDevice> device)
+void USB::onDeviceDisconnected(std::unique_ptr<WebUSBDevice> device)
 {
-    dispatchEvent(USBConnectionEvent::create(EventTypeNames::disconnect, USBDevice::create(device.release(), getExecutionContext())));
+    dispatchEvent(USBConnectionEvent::create(EventTypeNames::disconnect, USBDevice::create(adoptPtr(device.release()), getExecutionContext())));
 }
 
 DEFINE_TRACE(USB)
 {
     RefCountedGarbageCollectedEventTargetWithInlineData<USB>::trace(visitor);
     ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink