Exporting STL classes from a DLL produces a warning on MSVS.
This warning would only show up for component builds.

Change-Id: I1bd9b820a45c04f92b0278d7018507d6a2bc7936
Reviewed-on: https://chromium-review.googlesource.com/251704Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>