This causes some linker warnings. I don't think we should
add linker warnings to Chrome, so reverting this temporarily until
we can land your CL with the correct using of export keywords.

Please re-submit the fixed CL.

This reverts commit 56627322.

Change-Id: I21fa623af31fac06de6afbefa50c9ea1ec157c15
Reviewed-on: https://chromium-review.googlesource.com/305000Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>