Remove unsafe getFontMetrics methods

third_party/WebKit/Source/core/layout/line/RootInlineBox.cpp

 /*
  * Copyright (C) 2003, 2006, 2008 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 712 matching lines @@
     return LayoutUnit();
 
   LineLayoutItem parent = boxModel.parent();
   if (parent.isLayoutInline() &&
       parent.style()->verticalAlign() != VerticalAlignTop &&
       parent.style()->verticalAlign() != VerticalAlignBottom)
     verticalPosition = box->parent()->logicalTop();
 
   if (verticalAlign != VerticalAlignBaseline) {
     const Font& font = parent.style(firstLine)->font();
-    const FontMetrics& fontMetrics = font.getFontMetrics();
+    const SimpleFontData* fontData = font.primaryFont();
+    DCHECK(fontData);
+    if (!fontData)
+      return LayoutUnit();
+
+    const FontMetrics& fontMetrics = fontData->getFontMetrics();
     int fontSize = font.getFontDescription().computedPixelSize();
 
     LineDirectionMode lineDirection =
         parent.isHorizontalWritingMode() ? HorizontalLine : VerticalLine;
 
     if (verticalAlign == VerticalAlignSub) {
       verticalPosition += fontSize / 5 + 1;
     } else if (verticalAlign == VerticalAlignSuper) {
       verticalPosition -= fontSize / 3 + 1;
     } else if (verticalAlign == VerticalAlignTextTop) {
@@ skipping 69 matching lines @@
   }
   endBox = nullptr;
   return nullptr;
 }
 
 const char* RootInlineBox::boxName() const {
   return "RootInlineBox";
 }
 
 }  // namespace blink