Allow signin to continue even if sync is disabled by policy.

chrome/browser/sync/test/integration/migration_errors_test.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.
 
 // TODO(akalin): Rename this file to migration_test.cc.
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_harness.h"
@@ skipping 56 matching lines @@
 class MigrationTest : public SyncTest {
  public:
   explicit MigrationTest(TestType test_type) : SyncTest(test_type) {}
   virtual ~MigrationTest() {}
 
   // TODO(akalin): Add more MODIFY_(data type) trigger methods, as
   // well as a poll-based trigger method.
   enum TriggerMethod { MODIFY_PREF, MODIFY_BOOKMARK, TRIGGER_NOTIFICATION };
 
   syncer::ModelTypeSet GetPreferredDataTypes() {
+    // ProfileSyncService must already have been created before we can call
+    // GetPreferredDataTypes().
+    DCHECK(GetClient(0)->IsSyncAlreadySetup());
     const syncer::ModelTypeSet preferred_data_types =
         GetClient(0)->service()->GetPreferredDataTypes();
     // Make sure all clients have the same preferred data types.
     for (int i = 1; i < num_clients(); ++i) {
       const syncer::ModelTypeSet other_preferred_data_types =
           GetClient(i)->service()->GetPreferredDataTypes();
       EXPECT_TRUE(preferred_data_types.Equals(other_preferred_data_types));
     }
     return preferred_data_types;
   }
@@ skipping 313 matching lines @@
     // Do not add optional datatypes.
   }
 
   virtual ~MigrationReconfigureTest() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MigrationReconfigureTest);
 };
 
 }  // namespace