Revert "Remove resetScrollbars"

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 5d42bdac25b2d6c954d44fa2973ecd91db2e3f19..534be3ec7343da1276a08710fa82e0ea557d89ae 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -156,6 +156,7 @@ FrameView::~FrameView()
         m_didScrollTimer.stop();
 
     removeFromAXObjectCache();
+    resetScrollbars();
 
     // Custom scrollbars should already be destroyed at this point
     ASSERT(!horizontalScrollbar() || !horizontalScrollbar()->isCustomScrollbar());
@@ -212,6 +213,18 @@ void FrameView::removeFromAXObjectCache()
         cache->remove(this);
 }
 
+void FrameView::resetScrollbars()
+{
+    // Reset the document's scrollbars back to our defaults before we yield the floor.
+    m_firstLayout = true;
+    setScrollbarsSuppressed(true);
+    if (m_canHaveScrollbars)
+        setScrollbarModes(ScrollbarAuto, ScrollbarAuto);
+    else
+        setScrollbarModes(ScrollbarAlwaysOff, ScrollbarAlwaysOff);
+    setScrollbarsSuppressed(false);
+}
+
 void FrameView::init()
 {
     reset();