webusb: Reject the promise if the device is already open.

third_party/WebKit/Source/modules/webusb/USBError.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/USBError.h"
 
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "public/platform/modules/webusb/WebUSBError.h"
 
 namespace blink {
 
 DOMException* USBError::take(ScriptPromiseResolver*, const WebUSBError& webError)
 {
     switch (webError.error) {
+    case WebUSBError::Error::InvalidState:
+        return DOMException::create(InvalidStateError, webError.message);
     case WebUSBError::Error::Network:
         return DOMException::create(NetworkError, webError.message);
     case WebUSBError::Error::NotFound:
         return DOMException::create(NotFoundError, webError.message);
     case WebUSBError::Error::Security:
         return DOMException::create(SecurityError, webError.message);
     }
     ASSERT_NOT_REACHED();
     return DOMException::create(UnknownError);
 }
 
 } // namespace blink