third_party/WebKit: fix typos found in comments

third_party/WebKit/Source/core/css/RuleSetTest.cpp

 /*
  * Copyright (c) 2014, 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 61 matching lines @@
     ASSERT_EQ(str, rules->at(0).selector().tagQName().localName());
 }
 
 TEST(RuleSetTest, findBestRuleSetAndAdd_ClassThenId)
 {
     CSSTestHelper helper;
 
     helper.addCSSRules(".class#id { }");
     RuleSet& ruleSet = helper.ruleSet();
     AtomicString str("id");
-    // id is prefered over class even if class preceeds it in the selector.
+    // id is preferred over class even if class precedes it in the selector.
     const TerminatedArray<RuleData>* rules = ruleSet.idRules(str);
     ASSERT_EQ(1u, rules->size());
     AtomicString classStr("class");
     ASSERT_EQ(classStr, rules->at(0).selector().value());
 }
 
 TEST(RuleSetTest, findBestRuleSetAndAdd_IdThenClass)
 {
     CSSTestHelper helper;
 
@@ skipping 112 matching lines @@
 {
     CSSTestHelper helper;
 
     helper.addCSSRules(".foo:host-context(*) { }");
     RuleSet& ruleSet = helper.ruleSet();
     const WillBeHeapVector<RuleData>* rules = ruleSet.shadowHostRules();
     ASSERT_EQ(0u, rules->size());
 }
 
 } // namespace blink