GitLab

In recent change crrev.com/c/1263566, HeadlessContentUtilityClient
will be exported in component build on Windows. As usual, it should
be exported in headless.dll. However, library headless_shell_lib
also includes this class which results compilation errors.

This CL excludes HeadlessContentUtilityClient from
headless_shell_lib in component build to resolve the breakage.

BUG=894835

Change-Id: I44853a4c7a0701b9ea29cc16b18e9c3b358cb148
Reviewed-on: https://chromium-review.googlesource.com/c/1277883
Commit-Queue: Wei Li <weili@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599324}