Capture the exit status of the first-run AutoImport and make it available to tests.

This allows a CHECK() or other failure in the Import process to trigger
a test failure when run during automated testing.

BUG=174866
TEST=browser_tests: FirstRunIntegrationBrowserTest.*


Review URL: https://chromiumcodereview.appspot.com/12314093

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184807 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed