[Sync] Cleanup all tab sync enabling logic now that its on by default.

BUG=none
TEST=


Review URL: https://chromiumcodereview.appspot.com/10443046

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@139462 0039d316-1c4b-4281-b951-d872f2087c98
void ProfileSyncService::EnableEncryptEverything() {
  DCHECK(sync_initialized());
  if (!encrypt_everything_)
    encryption_pending_ = true;
  UMA_HISTOGRAM_BOOLEAN("Sync.EncryptAllData", true);
}

void ProfileSyncService::EnableEncryptEverything() {
  DCHECK(sync_initialized());
  if (!encrypt_everything_)
    encryption_pending_ = true;
  UMA_HISTOGRAM_BOOLEAN("Sync.EncryptAllData", true);
}
