Update URLPatternSet to contain a std::set instead of std::vector.

chrome/common/extensions/user_script_unittest.cc

Index: chrome/common/extensions/user_script_unittest.cc
diff --git a/chrome/common/extensions/user_script_unittest.cc b/chrome/common/extensions/user_script_unittest.cc
index c04e54dc9ac28637c03e97ee8e3db8353ced27a6..f3eb5fef0fee8979ceec23c969ab38cf7573ecf4 100644
--- a/chrome/common/extensions/user_script_unittest.cc
+++ b/chrome/common/extensions/user_script_unittest.cc
@@ -208,11 +208,8 @@ TEST(ExtensionUserScriptTest, Pickle) {
   for (size_t i = 0; i < script1.globs().size(); ++i) {
     EXPECT_EQ(script1.globs()[i], script2.globs()[i]);
   }
-  ASSERT_EQ(script1.url_patterns().size(), script2.url_patterns().size());
-  for (size_t i = 0; i < script1.url_patterns().size(); ++i) {
-    EXPECT_EQ(script1.url_patterns()[i].GetAsString(),
-              script2.url_patterns()[i].GetAsString());
-  }
+
+  ASSERT_EQ(script1.url_patterns(), script2.url_patterns());
 }
 
 TEST(ExtensionUserScriptTest, Defaults) {