Add null-check to ShapeResult::fallbackFonts

third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp

 /*
  * Copyright (c) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 BlackBerry Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 197 matching lines @@
     }
 
     return charactersSoFar;
 }
 
 void ShapeResult::fallbackFonts(HashSet<const SimpleFontData*>* fallback) const
 {
     ASSERT(fallback);
     ASSERT(m_primaryFont);
     for (unsigned i = 0; i < m_runs.size(); ++i) {
-        if (m_runs[i] && m_runs[i]->m_fontData != m_primaryFont
+        if (m_runs[i] && m_runs[i]->m_fontData
+            && m_runs[i]->m_fontData != m_primaryFont
             && !m_runs[i]->m_fontData->isTextOrientationFallbackOf(m_primaryFont.get())) {
             fallback->add(m_runs[i]->m_fontData.get());
         }
     }
 }
 
 void ShapeResult::applySpacing(ShapeResultSpacing& spacing, const TextRun& textRun)
 {
     float offsetX, offsetY;
     float& offset = spacing.isVerticalOffset() ? offsetY : offsetX;
@@ skipping 121 matching lines @@
                 break;
             }
         }
     }
     // If we didn't find an existing slot to place it, append.
     if (run)
         m_runs.append(std::move(run));
 }
 
 } // namespace blink