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

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/fonts/FontFallbackIterator.h"
 
 #include "platform/fonts/FontCache.h"
 #include "platform/fonts/FontDescription.h"
 #include "platform/fonts/FontFallbackList.h"
 #include "platform/fonts/SegmentedFontData.h"
@@ skipping 98 matching lines @@
 
     // If we don't have options from the system fallback anymore or had
     // previously returned them, we only have the last resort font left.
     // TODO: crbug.com/42217 Improve this by doing the last run with a last
     // resort font that has glyphs for everything, for example the Unicode
     // LastResort font, not just Times or Arial.
     FontCache* fontCache = FontCache::fontCache();
     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));
   }
 
   ASSERT(m_fallbackStage == FontGroupFonts || m_fallbackStage == SegmentedFace);
   const FontData* fontData =
       m_fontFallbackList->fontDataAt(m_fontDescription, m_currentFontDataIndex);
 
   if (!fontData) {
@@ skipping 104 matching lines @@
 
   if (!hint || m_previouslyAskedForHint.contains(hint))
     return nullptr;
   m_previouslyAskedForHint.insert(hint);
   return fontCache->fallbackFontForCharacter(
       m_fontDescription, hint,
       m_fontFallbackList->primarySimpleFontData(m_fontDescription));
 }
 
 }  // namespace blink