Add null-check to ShapeResult::fallbackFonts

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

Index: third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp b/third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp
index e05e7b13da28da65a3873b572c727bd5b5916c04..7849e7851e05d1a5ca9bc6a339f5259fe24ff462 100644
--- a/third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp
+++ b/third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp
@@ -215,7 +215,8 @@ 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());
         }