CodeGen: Fix blink_type_info

This is a follow-up CL for https://crrev.com/c/1994549


Bug: 839389
Change-Id: Ifdbe8cb1a0a5cfcd3a27fc486499e2c92c1c18d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1999826Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Commit-Queue: Hitoshi Yoshida <peria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#731867}

third_party/blink/renderer/bindings/scripts/bind_gen/blink_v8_bridge.py

@@ -65,6 +65,7 @@ def blink_type_info(idl_type):
                      is_nullable=False):
             self.member_t = member_fmt.format(typename)
             self.ref_t = ref_fmt.format(typename)
+            self.const_ref_t = const_ref_fmt.format(typename)
             self.value_t = value_fmt.format(typename)
             # Whether Blink impl type can represent IDL null or not.
             self.is_nullable = is_nullable