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

public/web/WebView.h

 /*
  * Copyright (C) 2009, 2010, 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 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebView_h
 #define WebView_h
 
 #include "../platform/WebColor.h"
+#include "../platform/WebDisplayMode.h"
 #include "../platform/WebPageVisibilityState.h"
 #include "../platform/WebString.h"
 #include "../platform/WebVector.h"
 #include "WebDragOperation.h"
 #include "WebHistoryCommitType.h"
 #include "WebHistoryItem.h"
 #include "WebWidget.h"
 
 namespace blink {
 
@@ skipping 223 matching lines @@
     // Prevent the web page from setting min/max scale via the viewport meta
     // tag. This is an accessibility feature that lets folks zoom in to web
     // pages even if the web page tries to block scaling.
     virtual void setIgnoreViewportTagScaleLimits(bool) = 0;
 
     // Returns the "preferred" contents size, defined as the preferred minimum width of the main document's contents
     // and the minimum height required to display the main document without scrollbars.
     // The returned size has the page zoom factor applied.
     virtual WebSize contentsPreferredMinimumSize() = 0;
 
+    // Sets the display mode of the web app.
+    virtual void setDisplayMode(WebDisplayMode) = 0;
+
     // The ratio of the current device's screen DPI to the target device's screen DPI.
     virtual float deviceScaleFactor() const = 0;
 
     // Sets the ratio as computed by computePageScaleConstraints.
     virtual void setDeviceScaleFactor(float) = 0;
 
     // Set and reset the device color profile.
     virtual void setDeviceColorProfile(const WebVector<char>&) = 0;
     virtual void resetDeviceColorProfile() = 0;
 
@@ skipping 197 matching lines @@
     // event gets generated/tested.
     virtual void forceNextWebGLContextCreationToFail() = 0;
 
 protected:
     ~WebView() {}
 };
 
 } // namespace blink
 
 #endif