Match 'i' attribute selector modifier case-insensitively

third_party/WebKit/Source/core/css/parser/CSSParserString.h

Index: third_party/WebKit/Source/core/css/parser/CSSParserString.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserString.h b/third_party/WebKit/Source/core/css/parser/CSSParserString.h
index f3434ab6c590dd4263beae72eeb018389f09ae9e..7ffb776f474f2f9d06f8ecb73d6d6df3b1a64c4d 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserString.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserString.h
@@ -90,6 +90,14 @@ struct CSSParserString {
         return str[length()] == '\0';
     }
 
+    template<unsigned matchLength>
+    bool equalIgnoringASCIICase(const char (&match)[matchLength]) const
+    {
+        if (matchLength - 1 != length())
+            return false;
+        return is8Bit() ? WTF::equalIgnoringASCIICase(match, characters8(), length()) : WTF::equalIgnoringASCIICase(match, characters16(), length());
+    }
+
     operator String() const { return is8Bit() ? String(m_data.characters8, m_length) : StringImpl::create8BitIfPossible(m_data.characters16, m_length); }
     operator AtomicString() const { return is8Bit() ? AtomicString(m_data.characters8, m_length) : AtomicString(m_data.characters16, m_length); }