Experimental viewport meta tag support for desktop, Blink-side.

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 1679 matching lines @@
     FrameView* view = mainFrameImpl()->frameView();
     if (!view)
         return;
 
     WebSize oldSize = m_size;
     float oldPageScaleFactor = pageScaleFactor();
     int oldContentsWidth = contentsSize().width();
 
     m_size = newSize;
 
-    bool shouldAnchorAndRescaleViewport = settings()->viewportEnabled() && oldSize.width && oldContentsWidth && newSize.width != oldSize.width;
+    bool shouldAnchorAndRescaleViewport = settings()->mainFrameResizesAreOrientationChanges()
+        && oldSize.width && oldContentsWidth && newSize.width != oldSize.width;
+
     ViewportAnchor viewportAnchor(&mainFrameImpl()->frame()->eventHandler());
     if (shouldAnchorAndRescaleViewport) {
         viewportAnchor.setAnchor(view->visibleContentRect(),
                                  FloatSize(viewportAnchorXCoord, viewportAnchorYCoord));
     }
 
     updatePageDefinedViewportConstraints(mainFrameImpl()->frame()->document()->viewportDescription());
     updateMainFrameLayoutSize();
 
     WebDevToolsAgentPrivate* agentPrivate = devToolsAgentPrivate();
@@ skipping 2466 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace WebKit