Fix TextAutosizer recalculate multipliers on rotate.

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 355 matching lines @@
 }
 
 void FrameView::setFrameRect(const IntRect& newRect)
 {
     IntRect oldRect = frameRect();
     if (newRect == oldRect)
         return;
 
     // Autosized font sizes depend on the width of the viewing area.
     if (newRect.width() != oldRect.width()) {
-        if (isMainFrame()) {
-            Page* page = m_frame->page();
-            bool textAutosizingEnabled = m_frame->settings()->textAutosizingEnabled();
-            if (textAutosizingEnabled) {
-                TextAutosizer* textAutosizer = m_frame->document()->textAutosizer();
-                if (textAutosizer) {
-                    for (LocalFrame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext())
-                        textAutosizer->recalculateMultipliers();
-                }
+        if (isMainFrame() && m_frame->settings()->textAutosizingEnabled()) {
+            for (LocalFrame* frame = m_frame.get(); frame; frame = frame->tree().traverseNext()) {
+                if (TextAutosizer* textAutosizer = frame->document()->textAutosizer())
+                    textAutosizer->recalculateMultipliers();
             }
         }
     }
 
     ScrollView::setFrameRect(newRect);
 
     updateScrollableAreaSet();
 
     if (RenderView* renderView = this->renderView()) {
         if (renderView->usesCompositing())
@@ skipping 2819 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace WebCore