Disable FTA when max multiplier is 1.

Source/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
  * License as published by the Free Software Foundation; either
@@ skipping 1628 matching lines @@
 bool RenderBlock::simplifiedLayout()
 {
     if ((!posChildNeedsLayout() && !needsSimplifiedNormalFlowLayout()) || normalChildNeedsLayout() || selfNeedsLayout())
         return false;
 
     LayoutStateMaintainer statePusher(*this, locationOffset());
 
     if (needsPositionedMovementLayout() && !tryLayoutDoingPositionedMovementOnly())
         return false;
 
-    FastTextAutosizer::LayoutScope fastTextAutosizerLayoutScope(document(), this);
+    FastTextAutosizer::LayoutScope fastTextAutosizerLayoutScope(this);
 
     // Lay out positioned descendants or objects that just need to recompute overflow.
     if (needsSimplifiedNormalFlowLayout())
         simplifiedNormalFlowLayout();
 
     // Make sure a forced break is applied after the content if we are a flow thread in a simplified layout.
     // This ensures the size information is correctly computed for the last auto-height region receiving content.
     if (isRenderFlowThread())
         toRenderFlowThread(this)->applyBreakAfterContent(clientLogicalBottom());
 
@@ skipping 3359 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace WebCore