Defer call to updateWidgetPositions() outside of RenderLayerScrollableArea.

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 84 matching lines @@
     void setCanInvalidatePaintDuringPerformLayout(bool b) { m_canInvalidatePaintDuringPerformLayout = b; }
     bool canInvalidatePaintDuringPerformLayout() const { return m_canInvalidatePaintDuringPerformLayout; }
 
     RenderObject* layoutRoot(bool onlyDuringLayout = false) const;
     void clearLayoutSubtreeRoot() { m_layoutSubtreeRoot = 0; }
     int layoutCount() const { return m_layoutCount; }
 
     bool needsLayout() const;
     void setNeedsLayout();
 
+    void setNeedsUpdateWidgetPositions() { m_needsUpdateWidgetPositions = true; }
+
     // Methods for getting/setting the size Blink should use to layout the contents.
     IntSize layoutSize(IncludeScrollbarsInRect = ExcludeScrollbars) const;
     void setLayoutSize(const IntSize&);
 
     // If this is set to false, the layout size will need to be explicitly set by the owner.
     // E.g. WebViewImpl sets its mainFrame's layout size manually
     void setLayoutSizeFixedToFrameSize(bool isFixed) { m_layoutSizeFixedToFrameSize = isFixed; }
     bool layoutSizeFixedToFrameSize() { return m_layoutSizeFixedToFrameSize; }
 
     bool needsFullPaintInvalidation() const { return m_doFullPaintInvalidation; }
@@ skipping 247 matching lines @@
     virtual void contentsResized() OVERRIDE;
     virtual void scrollbarExistenceDidChange() OVERRIDE;
 
     // Override ScrollView methods to do point conversion via renderers, in order to
     // take transforms into account.
     virtual IntRect convertToContainingView(const IntRect&) const OVERRIDE;
     virtual IntRect convertFromContainingView(const IntRect&) const OVERRIDE;
     virtual IntPoint convertToContainingView(const IntPoint&) const OVERRIDE;
     virtual IntPoint convertFromContainingView(const IntPoint&) const OVERRIDE;
 
+    void updateWidgetPositionsIfNeeded();
+
     void sendResizeEventIfNeeded();
 
     void updateScrollableAreaSet();
 
     virtual void notifyPageThatContentAreaWillPaint() const OVERRIDE;
 
     void scheduleUpdateWidgetsIfNecessary();
     void updateWidgetsTimerFired(Timer<FrameView>*);
     bool updateWidgets();
 
@@ skipping 109 matching lines @@
     float m_visibleContentScaleFactor;
     IntSize m_inputEventsOffsetForEmulation;
     float m_inputEventsScaleFactorForEmulation;
 
     IntSize m_layoutSize;
     bool m_layoutSizeFixedToFrameSize;
 
     Timer<FrameView> m_didScrollTimer;
 
     Vector<IntRect> m_tickmarks;
+
+    bool m_needsUpdateWidgetPositions;
 };
 
 inline void FrameView::incrementVisuallyNonEmptyCharacterCount(unsigned count)
 {
     if (m_isVisuallyNonEmpty)
         return;
     m_visuallyNonEmptyCharacterCount += count;
     // Use a threshold value to prevent very small amounts of visible content from triggering didFirstVisuallyNonEmptyLayout.
     // The first few hundred characters rarely contain the interesting content of the page.
     static const unsigned visualCharacterThreshold = 200;
@@ skipping 34 matching lines @@
         m_view->setCanInvalidatePaintDuringPerformLayout(m_originalValue);
     }
 private:
     FrameView* m_view;
     bool m_originalValue;
 };
 
 } // namespace blink
 
 #endif // FrameView_h