remove latin-1 flag

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 8a25432a68a88c1197baadefa430f8a585b8b30c..c75bd0002605d33e17e4e289652553f561a70a95 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -6259,10 +6259,6 @@ static void Utf16Helper(
       Local<v8::String>::Cast(a->Get(i));
     Local<v8::Number> expected_len =
       Local<v8::Number>::Cast(alens->Get(i));
-#ifndef ENABLE_LATIN_1
-    CHECK_EQ(expected_len->Value() != string->Length(),
-             string->MayContainNonAscii());
-#endif
     int length = GetUtf8Length(string);
     CHECK_EQ(static_cast<int>(expected_len->Value()), length);
   }
@@ -12931,10 +12927,8 @@ THREADED_TEST(MorphCompositeStringTest) {
         "var slice = lhs.substring(1, lhs.length - 1);"
         "var slice_on_cons = (lhs + rhs).substring(1, lhs.length *2 - 1);");
 
-#ifndef ENABLE_LATIN_1
-    CHECK(!lhs->MayContainNonAscii());
-    CHECK(!rhs->MayContainNonAscii());
-#endif
+    CHECK(lhs->IsOneByte());
+    CHECK(rhs->IsOneByte());
 
     MorphAString(*v8::Utils::OpenHandle(*lhs), &ascii_resource, &uc16_resource);
     MorphAString(*v8::Utils::OpenHandle(*rhs), &ascii_resource, &uc16_resource);