Profile shouldn't own Session/TabRestore services.

BaseSessionService is now a ProfileKeyedService. Its subclasses,
SessionService and TabRestoreService, are now accessed through
factories.

BUG=77155
TEST=existing tests


Review URL: http://codereview.chromium.org/6901031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@83325 0039d316-1c4b-4281-b951-d872f2087c98
34 files changed