Add initial Blink-side support for the Screen Orientation API

Source/web/WebScreenOrientationController.cpp

Index: Source/web/WebScreenOrientationController.cpp
diff --git a/Source/web/WebScreenOrientationController.cpp b/Source/web/WebScreenOrientationController.cpp
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index 0000000000000000000000000000000000000000..d42d20aefae087f1533a0bc6716a79f67afeeb6b
--- /dev/null
+++ b/Source/web/WebScreenOrientationController.cpp
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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.
+
+#include "config.h"
+#include "WebScreenOrientationController.h"
+
+#include "modules/screen_orientation/ScreenOrientationController.h"
+
+namespace blink {
+
+void WebScreenOrientationController::orientationChanged(WebScreenOrientation orientation)
+{
+    m_private->orientationChanged(static_cast<WebCore::ScreenOrientationValue>(orientation));
+}
+
+} // namespace blink