Add initial Blink-side support for the Screen Orientation API

Source/modules/screen_orientation/testing/ScreenOrientationClientMock.h

Index: Source/modules/screen_orientation/testing/ScreenOrientationClientMock.h
diff --git a/Source/modules/screen_orientation/testing/ScreenOrientationClientMock.h b/Source/modules/screen_orientation/testing/ScreenOrientationClientMock.h
new file mode 100644
index 0000000000000000000000000000000000000000..6ba3be22d633ff47e0ec6c508431abd5fdd3b0b0
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+++ b/Source/modules/screen_orientation/testing/ScreenOrientationClientMock.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 ScreenOrientationClientMock_h
+#define ScreenOrientationClientMock_h
+
+#include "modules/screen_orientation/ScreenOrientationClient.h"
+#include "platform/Timer.h"
+
+namespace WebCore {
+
+class ScreenOrientationController;
+
+// Provides a mock object for the screen orientation client.
+class ScreenOrientationClientMock FINAL : public ScreenOrientationClient {
+public:
+    ScreenOrientationClientMock();
+    virtual ~ScreenOrientationClientMock();
+
+    void setController(ScreenOrientationController*);
+    void setScreenOrientation(ScreenOrientationValue);
+
+    // ScreenOrientationClient API.
+    virtual void lockOrientation(ScreenOrientationValues) OVERRIDE;
+    virtual void unlockOrientation() OVERRIDE;
+
+private:
+    void asyncUpdateController();
+    void controllerTimerFired(Timer<ScreenOrientationClientMock>*);
+    void maybeUpdateOrientationAfterLocking();
+
+    Timer<ScreenOrientationClientMock> m_controllerTimer;
+    ScreenOrientationController* m_controller;
+    ScreenOrientationValue m_orientation;
+    ScreenOrientationValues m_lockedOrientations;
+};
+
+} // namespace WebCore
+
+#endif // ScreenOrientationClientMock_h