Make it possible to set the display mode from the WebView API

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 526 matching lines @@
             || (event.button == WebMouseEvent::ButtonLeft
                 && event.modifiers & WebMouseEvent::ControlKey))
             mouseContextMenu(event);
 #else
         if (event.button == WebMouseEvent::ButtonRight)
             mouseContextMenu(event);
 #endif
     }
 }
 
+void WebViewImpl::setDisplayMode(WebDisplayMode mode)
+{
+    if (!mainFrameImpl() || !mainFrameImpl()->frameView())
+        return;
+
+    mainFrameImpl()->frameView()->setDisplayMode(mode);
+}
+
 void WebViewImpl::mouseContextMenu(const WebMouseEvent& event)
 {
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return;
 
     m_page->contextMenuController().clearContextMenu();
 
     PlatformMouseEventBuilder pme(mainFrameImpl()->frameView(), event);
 
     // Find the right target frame. See issue 1186900.
@@ skipping 3992 matching lines @@
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 void WebViewImpl::forceNextWebGLContextCreationToFail()
 {
     WebGLRenderingContext::forceNextWebGLContextCreationToFail();
 }
 
 } // namespace blink