Screen Orientation API: cleanup, simplify and fix implementation.

Source/modules/screen_orientation/ScreenOrientationDispatcher.cpp

 // 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 "modules/screen_orientation/ScreenOrientationDispatcher.h"
 
 #include "modules/screen_orientation/ScreenOrientationController.h"
 #include "public/platform/Platform.h"
 #include "wtf/TemporaryChange.h"
@@ skipping 53 matching lines @@
             ++i;
         }
     }
 
     m_needsPurge = false;
 
     if (m_controllers.isEmpty())
         stopListening();
 }
 
-void ScreenOrientationDispatcher::didChangeScreenOrientation(blink::WebScreenOrientation orientation)
+void ScreenOrientationDispatcher::didChangeScreenOrientation(blink::WebScreenOrientationType orientation)
 {
     {
         TemporaryChange<bool> changeIsDispatching(m_isDispatching, true);
         // Don't fire controllers removed or added during event dispatch.
         size_t size = m_controllers.size();
         for (size_t i = 0; i < size; ++i) {
             if (m_controllers[i])
                 static_cast<ScreenOrientationController*>(m_controllers[i])->didChangeScreenOrientation(orientation);
         }
     }
 
     if (m_needsPurge)
         purgeControllers();
 }
 
 void ScreenOrientationDispatcher::startListening()
 {
     blink::Platform::current()->setScreenOrientationListener(this);
 }
 
 void ScreenOrientationDispatcher::stopListening()
 {
     blink::Platform::current()->setScreenOrientationListener(0);
 }
 
 } // namespace WebCore