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