WebUSB: Create a requestDevice method separate from getDevice.

Source/modules/webusb/USB.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 USB_h
 #define USB_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/webusb/USBController.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class LocalFrame;
 class ScriptState;
-class USBDeviceEnumerationOptions;
+class USBDeviceRequestOptions;
 
 class USB final
     : public GarbageCollectedFinalized<USB>
     , public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static USB* create(LocalFrame& frame)
     {
         return new USB(frame);
     }
 
     explicit USB(LocalFrame& frame);
 
-    ScriptPromise getDevices(ScriptState*, const USBDeviceEnumerationOptions&);
+    ScriptPromise getDevices(ScriptState*);
+    ScriptPromise requestDevice(ScriptState*, const USBDeviceRequestOptions&);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     RawPtrWillBeMember<USBController> m_controller;
 };
 
 } // namespace blink
 
 #endif // USB_h