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

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 85 matching lines @@
 using namespace HTMLNames;
 
 double FrameView::s_currentFrameTimeStamp = 0.0;
 
 // The maximum number of updateWidgets iterations that should be done before returning.
 static const unsigned maxUpdateWidgetsIterations = 2;
 static const double resourcePriorityUpdateDelayAfterScroll = 0.250;
 
 FrameView::FrameView(LocalFrame* frame)
     : m_frame(frame)
+    , m_displayMode(WebDisplayModeBrowser)
     , m_canHaveScrollbars(true)
     , m_slowRepaintObjectCount(0)
     , m_hasPendingLayout(false)
     , m_layoutSubtreeRoot(0)
     , m_inSynchronousPostLayout(false)
     , m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired)
     , m_updateWidgetsTimer(this, &FrameView::updateWidgetsTimerFired)
     , m_isTransparent(false)
     , m_baseBackgroundColor(Color::white)
     , m_mediaType(MediaTypeNames::screen)
@@ skipping 1062 matching lines @@
     ASSERT(isInPerformLayout());
     // Tell the DOM element that it needs a widget update.
     Node* node = object.node();
     ASSERT(node);
     if (isHTMLObjectElement(*node) || isHTMLEmbedElement(*node))
         toHTMLPlugInElement(node)->setNeedsWidgetUpdate(true);
 
     m_partUpdateSet.add(&object);
 }
 
+void FrameView::setDisplayMode(WebDisplayMode mode)
+{
+    m_displayMode = mode;
+    m_frame->document()->mediaQueryAffectingValueChanged();
+}
+
 void FrameView::setMediaType(const AtomicString& mediaType)
 {
     ASSERT(m_frame->document());
     m_frame->document()->mediaQueryAffectingValueChanged();
     m_mediaType = mediaType;
 }
 
 AtomicString FrameView::mediaType() const
 {
     // See if we have an override type.
@@ skipping 2821 matching lines @@
         return;
 
     ScrollableArea::setScrollOrigin(origin);
 
     // Update if the scroll origin changes, since our position will be different if the content size did not change.
     if (updatePositionAtAll && updatePositionSynchronously)
         updateScrollbars(scrollOffsetDouble());
 }
 
 } // namespace blink