sync: Remove some WebUI debug functions

sync/js/js_test_util.h

Index: sync/js/js_test_util.h
diff --git a/sync/js/js_test_util.h b/sync/js/js_test_util.h
index 9cf91fbcfb712b6ac159b1743db91fe98e1c6009..8f9824837f879295df507fa1e0935a30d302fc92 100644
--- a/sync/js/js_test_util.h
+++ b/sync/js/js_test_util.h
@@ -35,10 +35,6 @@ void PrintTo(const JsEventDetails& details, ::std::ostream* os);
 //   EXPECT_CALL(mock, HandleJsReply("foo", HasArgs(expected_args)));
 ::testing::Matcher<const JsArgList&> HasArgs(const JsArgList& expected_args);
 
-// Like HasArgs() but takes a ListValue instead.
-::testing::Matcher<const JsArgList&> HasArgsAsList(
-    const base::ListValue& expected_args);
-
 // A gmock matcher for JsEventDetails.  Use like:
 //
 //   EXPECT_CALL(mock, HandleJsEvent("foo", HasArgs(expected_details)));