Chromium plumbing for Screen Orientation API lock/unlock.

content/browser/screen_orientation/screen_orientation_provider.h

+// 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 CONTENT_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
+#define CONTENT_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
+
+namespace content {
+
+// Interface that needs to be implemented by any backend that wants to handle
+// screen orientation lock/unlock.
+class ScreenOrientationProvider {
+ public:
+  // Lock the screen orientation to |orientations|.
+  virtual void LockOrientation(blink::WebScreenOrientations orientations) = 0;
+
+  // Unlock the screen orientation.
+  virtual void UnlockOrientation() = 0;
+
+  virtual ~ScreenOrientationProvider() {}
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_