CSSParserString::equalIgnoringCase should check string length.

Source/core/css/CSSParserValuesTest.cpp

 /*
  * Copyright 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 38 matching lines @@
 TEST(CSSParserValuesTest, InitWithEmpty16BitsString)
 {
     String string16bit("a");
     string16bit.ensure16Bit();
 
     CSSParserString cssParserString;
     cssParserString.init(string16bit, 1, 0);
     ASSERT_EQ(0u, cssParserString.length());
 }
 
+TEST(CSSParserValuesTest, EqualIgnoringCase8BitsString)
+{
+    CSSParserString cssParserString;
+    String string8bit("sHaDOw");
+    cssParserString.init(string8bit, 0, string8bit.length());
+
+    ASSERT_TRUE(cssParserString.equalIgnoringCase("shadow"));
+    ASSERT_TRUE(cssParserString.equalIgnoringCase("ShaDow"));
+    ASSERT_FALSE(cssParserString.equalIgnoringCase("shadow-all"));
+    ASSERT_FALSE(cssParserString.equalIgnoringCase("sha"));
+    ASSERT_FALSE(cssParserString.equalIgnoringCase("abCD"));
+}
+
+TEST(CSSParserValuesTest, EqualIgnoringCase16BitsString)
+{
+    String string16bit("sHaDOw");
+    string16bit.ensure16Bit();
+
+    CSSParserString cssParserString;
+    cssParserString.init(string16bit, 0, string16bit.length());
+
+    ASSERT_TRUE(cssParserString.equalIgnoringCase("shadow"));
+    ASSERT_TRUE(cssParserString.equalIgnoringCase("ShaDow"));
+    ASSERT_FALSE(cssParserString.equalIgnoringCase("shadow-all"));
+    ASSERT_FALSE(cssParserString.equalIgnoringCase("sha"));
+    ASSERT_FALSE(cssParserString.equalIgnoringCase("abCD"));
+}
+
 } // namespace