Fix ::first-letter not to apply non-block containers

third_party/WebKit/Source/core/layout/LayoutObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 871 matching lines @@
   }
   bool isColumnSpanAll() const {
     return style()->getColumnSpan() == ColumnSpanAll && spannerPlaceholder();
   }
 
   // We include isLayoutButton() in this check, because buttons are
   // implemented using flex box but should still support things like
   // first-line, first-letter and text-overflow.
   // The flex box and grid specs require that flex box and grid do not
   // support first-line|first-letter, though.
+  // When LayoutObject and display do not agree, allow first-line|first-letter
+  // only when both indicate it's a block container.
   // TODO(cbiesinger): Remove when buttons are implemented with align-items
   // instead of flex box. crbug.com/226252.
   bool behavesLikeBlockContainer() const {
-    return isLayoutBlockFlow() || isLayoutButton();
+    return (isLayoutBlockFlow() && style()->isDisplayBlockContainer()) ||
+           isLayoutButton();
   }
 
   // May be optionally passed to container() and various other similar methods
   // that search the ancestry for some sort of containing block. Used to
   // determine if we skipped certain objects while walking the ancestry.
   class AncestorSkipInfo {
    public:
     AncestorSkipInfo(const LayoutObject* ancestor, bool checkForFilters = false)
         : m_ancestor(ancestor), m_checkForFilters(checkForFilters) {}
 
@@ skipping 1805 matching lines @@
 CORE_EXPORT void showLineTree(const blink::LayoutObject*);
 CORE_EXPORT void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 CORE_EXPORT void showLayoutTree(const blink::LayoutObject* object1,
                                 const blink::LayoutObject* object2);
 
 #endif
 
 #endif  // LayoutObject_h