Roll Win-Clang 238562:239639

This picks up several fixes related to dllexport on explicit
instantiation definitions, and name lookup in dependent base
classes.

BUG=82385, 492283
TBR=thakis

Review URL: https://codereview.chromium.org/1182953002.

Cr-Commit-Position: refs/heads/master@{#334283}
2 files changed