Fix inspector overlay when use-zoom-for-dsf is enabled.

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
@@ skipping 490 matching lines @@
     // document's top left corner and thus are not affected by scroll offset.
     IntPoint contentsToFrame(const IntPoint&) const;
     IntRect contentsToFrame(const IntRect&) const;
     IntPoint frameToContents(const IntPoint&) const;
     FloatPoint frameToContents(const FloatPoint&) const;
     IntRect frameToContents(const IntRect&) const;
 
     // Functions for converting to screen coordinates.
     IntRect contentsToScreen(const IntRect&) const;
 
+    float viewportToWindowScale() const;

[dgozman, 2016/07/07 00:30:09]

Let's not introduce this method, it will encourage the use of it. Just inline it
in call places.

[Bret, 2016/07/07 01:15:11]

Done.

+
     // These functions are used to enable scrollbars to avoid window resizer controls that overlap the scroll view.
     // This happens only on Mac OS X 10.6.
     IntRect windowResizerRect() const;
     bool containsScrollbarsAvoidingResizer() const;
     void adjustScrollbarsAvoidingResizerCount(int overlapDelta);
     void windowResizerRectChanged();
 
     // For platforms that need to hit test scrollbars from within the engine's event handlers (like Win32).
     Scrollbar* scrollbarAtFramePoint(const IntPoint&);
 
@@ skipping 434 matching lines @@
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView, ScrollableArea, scrollableArea, scrollableArea->isFrameView(), scrollableArea.isFrameView());
 
 } // namespace blink
 
 #endif // FrameView_h