Remove unsafe getFontMetrics methods

third_party/WebKit/Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 4513 matching lines @@
 
   // If height of box is smaller than font height, use the latter one,
   // otherwise the caret might become invisible.
   //
   // Also, if the box is not an atomic inline-level element, always use the font
   // height. This prevents the "big caret" bug described in:
   // <rdar://problem/3777804> Deleting all content in a document can result in
   // giant tall-as-window insertion point
   //
   // FIXME: ignoring :first-line, missing good reason to take care of
-  LayoutUnit fontHeight = LayoutUnit(style()->getFontMetrics().height());
+  const SimpleFontData* fontData = style()->font().primaryFont();
+  LayoutUnit fontHeight =
+      LayoutUnit(fontData ? fontData->getFontMetrics().height() : 0);
   if (fontHeight > rect.height() || (!isAtomicInlineLevel() && !isTable()))
     rect.setHeight(fontHeight);
 
   if (extraWidthToEndOfLine)
     *extraWidthToEndOfLine = location().x() + size().width() - rect.maxX();
 
   // Move to local coords
   rect.moveBy(-location());
 
   // FIXME: Border/padding should be added for all elements but this workaround
@@ skipping 1032 matching lines @@
   LayoutRect rect = frameRect();
 
   LayoutBlock* block = containingBlock();
   if (block)
     block->adjustChildDebugRect(rect);
 
   return rect;
 }
 
 }  // namespace blink