Capture font-related data in minidump when last resort font failed

third_party/WebKit/Source/platform/fonts/FontFallbackIterator.cpp

Index: third_party/WebKit/Source/platform/fonts/FontFallbackIterator.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/FontFallbackIterator.cpp b/third_party/WebKit/Source/platform/fonts/FontFallbackIterator.cpp
index d082f33aa764c583cdaf11af16b16792407a60d0..3a4bef36ae1a8cca32d700ef5cc793a7a81b1f27 100644
--- a/third_party/WebKit/Source/platform/fonts/FontFallbackIterator.cpp
+++ b/third_party/WebKit/Source/platform/fonts/FontFallbackIterator.cpp
@@ -116,7 +116,8 @@ PassRefPtr<FontDataForRangeSet> FontFallbackIterator::next(
     m_fallbackStage = OutOfLuck;
     RefPtr<SimpleFontData> lastResort =
         fontCache->getLastResortFallbackFont(m_fontDescription).get();
-    RELEASE_ASSERT(lastResort);
+    if (!lastResort)
+      FontCache::crashWithFontInfo(&m_fontDescription);
     // Don't skip the LastResort font in uniqueOrNext() since HarfBuzzShaper
     // needs to use this one to place missing glyph boxes.
     return adoptRef(new FontDataForRangeSetFromCache(lastResort));