Add WebUSB bindings and client interface [part 2]

Source/modules/webusb/USBError.cpp

Index: Source/modules/webusb/USBError.cpp
diff --git a/Source/modules/webusb/USBError.cpp b/Source/modules/webusb/USBError.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c3574f2ad6aece997a245fb9925c9c4c653db4b8
--- /dev/null
+++ b/Source/modules/webusb/USBError.cpp
@@ -0,0 +1,28 @@
+// 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 "config.h"
+#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*, PassOwnPtr<WebUSBError> webError)
+{
+    switch (webError->error) {
+    case WebUSBError::Error::Device:
+    case WebUSBError::Error::Security:
+    case WebUSBError::Error::Service:
+    case WebUSBError::Error::Transfer:
+        // TODO(rockot): Differentiate between different error types.
+        return DOMException::create(AbortError, webError->message);
+    }
+    ASSERT_NOT_REACHED();
+    return DOMException::create(UnknownError);
+}
+
+} // namespace blink