[DevTools] Switch from DIP to CSS pixels in device mode.

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 3653 matching lines @@
 
 void WebViewImpl::didChangeContentsSize()
 {
     m_pageScaleConstraintsSet.didChangeContentsSize(contentsSize(), pageScaleFactor());
 }
 
 void WebViewImpl::deviceOrPageScaleFactorChanged()
 {
     m_pageScaleConstraintsSet.setNeedsReset(false);
     updateLayerTreeViewport();
+    m_page->inspectorController().deviceOrPageScaleFactorChanged();
 }
 
 bool WebViewImpl::useExternalPopupMenus()
 {
     return shouldUseExternalPopupMenus;
 }
 
 void WebViewImpl::startDragging(LocalFrame* frame,
                                 const WebDragData& dragData,
                                 WebDragOperationsMask mask,
@@ skipping 469 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 blink