Blink: Pass 'unobscured' rect to WebPlugins.

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 136 matching lines @@
 
     // True if the FrameView is not transparent, and the base background color is opaque.
     bool hasOpaqueBackground() const;
 
     Color baseBackgroundColor() const;
     void setBaseBackgroundColor(const Color&);
     void updateBackgroundRecursively(const Color&, bool);
 
     void adjustViewSize();
 
-    IntRect windowClipRectForFrameOwner(const HTMLFrameOwnerElement*) const;
+    // |clipRect| may not be nullptr. |unobscuredRect| is the clip rect that is not clipped to the root window. It may be nullptr.

[Julien - ping for review, 2015/03/27 21:26:07]

I assume this should read: |clipRect| must not be nullptr (you have an ASSERT
for that)

[tommycli, 2015/03/27 22:42:51]

Done.

+    void getClipRectsForFrameOwner(const HTMLFrameOwnerElement*, IntRect* clipRect, IntRect* unobscuredRect) const;
 
     float visibleContentScaleFactor() const { return m_visibleContentScaleFactor; }
     void setVisibleContentScaleFactor(float);
 
     // Scale used to convert incoming input events. Usually the same as visibleContentScaleFactor(), unless specifically changed.
     float inputEventsScaleFactor() const;
     // Offset used to convert incoming input events while emulating device metics.
     IntSize inputEventsOffsetForEmulation() const;
     void setInputEventsTransformForEmulation(const IntSize&, float);
 
@@ skipping 703 matching lines @@
     static const unsigned visualPixelThreshold = 32 * 32;
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 
 } // namespace blink
 
 #endif // FrameView_h