Avoid calling lower() on inline styles in parseKeywordValue.

third_party/WebKit/Source/wtf/text/StringImpl.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller ( mueller@kde.org )
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 2274 matching lines @@
     if (a->is8Bit()) {
         if (b->is8Bit())
             return equalIgnoringASCIICase(a->characters8(), b->characters8(), length);
         return equalIgnoringASCIICase(a->characters8(), b->characters16(), length);
     }
     if (b->is8Bit())
         return equalIgnoringASCIICase(a->characters16(), b->characters8(), length);
     return equalIgnoringASCIICase(a->characters16(), b->characters16(), length);
 }
 
-bool equalIgnoringASCIICase(const StringImpl* a, const LChar* b)
+bool equalIgnoringASCIICase(const StringImpl* a, const LChar* b, unsigned length)
 {
     if (!a || !b)
         return !a == !b;
-    size_t length = strlen(reinterpret_cast<const char*>(b));
-    CHECK_LE(length, numeric_limits<unsigned>::max());

[esprehn, 2016/05/24 22:44:26]

This isn't needed, we're not going to allocate a string with |b|, and the
comparison between an unsigned and a size_t is defined, if for some reason |b|
was actually bigger than UINT_MAX it would necessarily fail the comparison to
the length() below which unsigned.

     if (length != a->length())
         return false;
     return equalSubstringIgnoringASCIICase(a, 0, b, length);
 }
 
 template<typename CharacterType1, typename CharacterType2>
 int codePointCompareIgnoringASCIICase(unsigned l1, unsigned l2, const CharacterType1* c1, const CharacterType2* c2)
 {
     const unsigned lmin = l1 < l2 ? l1 : l2;
     unsigned pos = 0;
@@ skipping 47 matching lines @@
         } else if (localeIdMatchesLang(localeIdentifier, "lt")) {
             // TODO(rob.buis) implement upper-casing rules for lt
             // like in StringImpl::upper(locale).
         }
     }
 
     return toUpper(c);
 }
 
 } // namespace WTF