[Sync] Fix namespaces for the browser_sync component.

components/browser_sync/signin_confirmation_helper.h

 // Copyright 2015 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_BROWSER_SYNC_SIGNIN_CONFIRMATION_HELPER_H_
 #define COMPONENTS_BROWSER_SYNC_SIGNIN_CONFIRMATION_HELPER_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/task/cancelable_task_tracker.h"
 
 namespace history {
 class HistoryService;
 class QueryResults;
 }
 
-namespace sync_driver {
+namespace browser_sync {
 
 // Helper class for sync signin to check some asynchronous conditions. Call
 // either CheckHasHistory or CheckHasTypedUrls or both, and |return_result|
 // will be called with true if either returns true, otherwise false.
 class SigninConfirmationHelper {
  public:
   SigninConfirmationHelper(history::HistoryService* history_service,
                            const base::Callback<void(bool)>& return_result);
 
   // This helper checks if there are history entries in the history service.
@@ skipping 28 matching lines @@
 
   // Keep track of how many async requests are pending.
   int pending_requests_;
 
   // Callback to pass the result back to the caller.
   const base::Callback<void(bool)> return_result_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninConfirmationHelper);
 };
 
-}  // namespace sync_driver
+}  // namespace browser_sync
 
 #endif  // COMPONENTS_BROWSER_SYNC_SIGNIN_CONFIRMATION_HELPER_H_