Add assertion preventing is_component_build=true from being used with use_clang_coverage.

Bug: 773530
Change-Id: Ib0997ffdead67437f61e279791a7a8887cbe807f
Reviewed-on: https://chromium-review.googlesource.com/714279
Commit-Queue: Jonathan Metzman <metzman@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#509058}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 301ce027adbc5555dec9ac7e449af1732ce3a5f9
1 file changed