Introduce newline tokens into the token stream.

runtime/vm/object_test.cc

Index: runtime/vm/object_test.cc
diff --git a/runtime/vm/object_test.cc b/runtime/vm/object_test.cc
index 82a5d8d5c0ee029bcd9f6cdca26a02a422f05f20..dcb3bbe5fdefe14c46218140ec75143f9cc48cc5 100644
--- a/runtime/vm/object_test.cc
+++ b/runtime/vm/object_test.cc
@@ -2080,8 +2080,8 @@ TEST_CASE(EmbeddedScript) {
   EXPECT_EQ(0, first_idx);  // Token 'main' is first token.
   EXPECT_EQ(3, last_idx);   // Token { is last token.
   script.TokenRangeAtLine(5, &first_idx, &last_idx);
-  EXPECT_EQ(7, first_idx);  // Token } is first and only token.
-  EXPECT_EQ(7, last_idx);
+  EXPECT_EQ(9, first_idx);  // Token } is first and only token.
+  EXPECT_EQ(9, last_idx);
 }