Use Promises for screen.lockOrientation().

public/platform/WebDOMException.h

Index: public/platform/WebDOMException.h
diff --git a/public/platform/WebDOMException.h b/public/platform/WebDOMException.h
new file mode 100644
index 0000000000000000000000000000000000000000..3b8443a04b5d6e7519e82ac2b83a4aa67f52ffd5
--- /dev/null
+++ b/public/platform/WebDOMException.h
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+// Copyright 2014 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 WebDOMException_h
+#define WebDOMException_h
+
+#include "public/platform/WebCommon.h"
+#include "public/platform/WebPrivatePtr.h"
+#include "public/platform/WebString.h"
+
+namespace v8 {
+class Value;
+template <class T> class Handle;
+}
+
+namespace WebCore { class DOMException; }
+
+namespace blink {
+
+class WebDOMException {
+public:
+    ~WebDOMException() { reset(); }
+
+    WebDOMException() { }
+    WebDOMException(const WebDOMException& b) { assign(b); }
+    WebDOMException& operator=(const WebDOMException& b)
+    {
+        assign(b);
+        return *this;
+    }
+
+    BLINK_EXPORT static WebDOMException create(unsigned short code, const WebString& name, const WebString& message);
+
+    BLINK_EXPORT void reset();
+    BLINK_EXPORT void assign(const WebDOMException&);
+
+    BLINK_EXPORT unsigned short code() const;
+    BLINK_EXPORT WebString name() const;
+    BLINK_EXPORT WebString message() const;
+
+    BLINK_EXPORT v8::Handle<v8::Value> toV8Value();
+
+#if BLINK_IMPLEMENTATION
+    explicit WebDOMException(const PassRefPtrWillBeRawPtr<WebCore::DOMException>&);
+    WebDOMException& operator=(const PassRefPtrWillBeRawPtr<WebCore::DOMException>&);
+#endif
+
+protected:
+    WebPrivatePtr<WebCore::DOMException> m_private;
+};
+
+} // namespace blink
+
+#endif // WebDOMException_h
+