Fix "notificiation" and "soruce" typos.

components/sync/driver/backend_migrator.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_
 #define COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 49 matching lines @@
   // Starts a sequence of events that will disable and reenable |types|.
   void MigrateTypes(syncer::ModelTypeSet types);
 
   void AddMigrationObserver(MigrationObserver* observer);
   bool HasMigrationObserver(const MigrationObserver* observer) const;
   void RemoveMigrationObserver(MigrationObserver* observer);
 
   State state() const;
 
   // Called from ProfileSyncService to notify us of configure done.
-  // Note: We receive these notificiations only when our state is not IDLE.
+  // Note: We receive these notifications only when our state is not IDLE.
   void OnConfigureDone(
       const sync_driver::DataTypeManager::ConfigureResult& result);
 
   // Returns the types that are currently pending migration (if any).
   syncer::ModelTypeSet GetPendingMigrationTypesForTest() const;
 
  private:
   void ChangeState(State new_state);
 
   // Must be called only in state WAITING_TO_START.  If ready to
@@ skipping 23 matching lines @@
   base::Closure migration_done_callback_;
 
   base::WeakPtrFactory<BackendMigrator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackendMigrator);
 };
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_