Do not initialize sync or policy on import process.

This fixes a conflict that occurs when the WebDataService is initialized on both the Import and normal processes
and they both try to open the same DB file.

This is a temporary fix for M26 - for M27 we will change ProfileDependencyManager to not launch any services on the
import process.

TBR=pkasting

BUG=174864


Review URL: https://chromiumcodereview.appspot.com/12310042

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184116 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed