Typo fix: Include a .h file instead of a .cc file in a test

A test includes the cc file
components/search_engines/search_engines_test_util.cc instead of
its header file. This patch changes that to include the header
file instead.

This inclusion has caused no to me known problems and was just found
as a result of looking through the source for this pattern after
a similar instance did cause problems.

Change-Id: Iffdb68a8055d69a8a3df450c7982ec1e674dcf6e
Reviewed-on: https://chromium-review.googlesource.com/1005175
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563075}
1 file changed