Add initial Blink-side support for the Screen Orientation API

public/web/WebViewClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 53 matching lines @@
 class WebGestureEvent;
 class WebHelperPlugin;
 class WebHitTestResult;
 class WebImage;
 class WebInputElement;
 class WebKeyboardEvent;
 class WebMIDIClient;
 class WebNode;
 class WebNotificationPresenter;
 class WebRange;
+class WebScreenOrientationClient;
 class WebSpeechInputController;
 class WebSpeechInputListener;
 class WebSpeechRecognizer;
 class WebStorageNamespace;
 class WebURL;
 class WebURLRequest;
 class WebUserMediaClient;
 class WebView;
 class WebWidget;
 struct WebColorSuggestion;
@@ skipping 242 matching lines @@
 
     virtual void didUpdateInspectorSetting(const WebString& key, const WebString& value) { }
 
     // Geolocation ---------------------------------------------------------
 
     // Access the embedder API for (client-based) geolocation client .
     virtual WebGeolocationClient* geolocationClient() { return 0; }
     // Access the embedder API for (non-client-based) geolocation services.
     virtual WebGeolocationService* geolocationService() { return 0; }
 
+    // Screen Orientation --------------------------------------------------
+
+    // Access the embedder API for (client-based) screen orientation client.
+    virtual WebScreenOrientationClient* screenOrientationClient() { return 0; }
+
     // Speech --------------------------------------------------------------
 
     // Access the embedder API for speech input services.
     virtual WebSpeechInputController* speechInputController(
         WebSpeechInputListener*) { return 0; }
 
     // Access the embedder API for speech recognition services.
     virtual WebSpeechRecognizer* speechRecognizer() { return 0; }
 
     // Zoom ----------------------------------------------------------------
@@ skipping 77 matching lines @@
     // Informs the browser that the draggable regions have been updated.
     virtual void draggableRegionsChanged() { }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace blink
 
 #endif