[Sync] Add support for performing a GetKey on startup.

sync/internal_api/syncapi_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.
 
 // Unit tests for the SyncApi. Note that a lot of the underlying
 // functionality is provided by the Syncable layer, which has its own
 // unit tests. We'll test SyncApi specific things in this harness.
 
 #include <cstddef>
 #include <map>
@@ skipping 757 matching lines @@
                        WeakHandle<JsEventHandler>(),
                        "bogus", 0, false,
                        base::MessageLoopProxy::current(),
                        scoped_ptr<HttpPostProviderFactory>(
                            new TestHttpPostProviderFactory()),
                        routing_info, workers,
                        &extensions_activity_monitor_, this,
                        credentials,
                        scoped_ptr<SyncNotifier>(sync_notifier_mock_),
                        "",
+                       true,  // enable keystore encryption
                        syncer::SyncManager::TEST_IN_MEMORY,
                        &encryptor_,
                        &handler_,
                        NULL);
 
     EXPECT_TRUE(sync_notifier_observer_);
     EXPECT_TRUE(js_backend_.IsInitialized());
 
     EXPECT_EQ(0, update_enabled_types_call_count_);
 
@@ skipping 1818 matching lines @@
   // Ensure only bookmarks and nigori lost their progress marker. Preferences
   // should still have it.
   partial_types =
       sync_manager_.GetTypesWithEmptyProgressMarkerToken(ModelTypeSet::All());
   EXPECT_TRUE(partial_types.Has(NIGORI));
   EXPECT_TRUE(partial_types.Has(BOOKMARKS));
   EXPECT_FALSE(partial_types.Has(PREFERENCES));
 }
 
 }  // namespace