Turn on SyncedNotifications for Dev, Canary, and Unknown channel

Turning it on in Dev and Canary will allow us to gather feedback during the development process.

BUG=22205


Review URL: https://chromiumcodereview.appspot.com/12617010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@190089 0039d316-1c4b-4281-b951-d872f2087c98
  static void CheckDefaultDatatypesInMapExcept(
      DataTypeController::StateMap* map,
      syncer::ModelType exception_type) {
    std::vector<syncer::ModelType> defaults = DefaultDatatypes();
    std::vector<syncer::ModelType>::iterator iter;
    for (iter = defaults.begin(); iter != defaults.end(); ++iter) {
      if (exception_type != syncer::UNSPECIFIED && exception_type == *iter)
        EXPECT_EQ(0U, map->count(*iter))
            << *iter << " found in dataypes map, shouldn't be there.";
      else
        EXPECT_EQ(1U, map->count(*iter))
            << *iter << " not found in datatypes map";
    }
  }

  static void CheckDefaultDatatypesInMapExcept(
      DataTypeController::StateMap* map,
      syncer::ModelType exception_type) {
    std::vector<syncer::ModelType> defaults = DefaultDatatypes();
    std::vector<syncer::ModelType>::iterator iter;
    for (iter = defaults.begin(); iter != defaults.end(); ++iter) {
      if (exception_type != syncer::UNSPECIFIED && exception_type == *iter)
        EXPECT_EQ(0U, map->count(*iter))
            << *iter << " found in dataypes map, shouldn't be there.";
      else
        EXPECT_EQ(1U, map->count(*iter))
            << *iter << " not found in datatypes map";
    }
  }
