sync: don't allow NULL profile in ProfileSyncService and friends

chrome/browser/sync/sync_prefs_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/sync_prefs.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 214 matching lines @@
   EXPECT_NE(base::Time(), sync_prefs.GetLastSyncedTime());
   EXPECT_EQ("token", sync_prefs.GetEncryptionBootstrapToken());
 
   sync_prefs.ClearPreferences();
 
   EXPECT_FALSE(sync_prefs.HasSyncSetupCompleted());
   EXPECT_EQ(base::Time(), sync_prefs.GetLastSyncedTime());
   EXPECT_TRUE(sync_prefs.GetEncryptionBootstrapToken().empty());
 }
 
-TEST_F(SyncPrefsTest, NullPrefService) {
-  SyncPrefs sync_prefs(NULL);
-
-  EXPECT_FALSE(sync_prefs.HasSyncSetupCompleted());
-  EXPECT_FALSE(sync_prefs.IsStartSuppressed());
-  EXPECT_EQ(base::Time(), sync_prefs.GetLastSyncedTime());
-  EXPECT_FALSE(sync_prefs.HasKeepEverythingSynced());
-  const syncer::ModelTypeSet user_types = syncer::UserTypes();
-  EXPECT_TRUE(sync_prefs.GetPreferredDataTypes(user_types).Empty());
-  EXPECT_FALSE(sync_prefs.IsManaged());
-  EXPECT_TRUE(sync_prefs.GetEncryptionBootstrapToken().empty());
-}
-
 }  // namespace
 
 }  // namespace browser_sync