[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/sync_sessions_client.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_SYNC_SESSIONS_SYNC_SESSIONS_CLIENT_H_
 #define COMPONENTS_SYNC_SESSIONS_SYNC_SESSIONS_CLIENT_H_
 
 #include <memory>
 
 #include "base/macros.h"
 
 class GURL;
 
 namespace bookmarks {
 class BookmarkModel;
 }
 
-namespace browser_sync {
-class LocalSessionEventRouter;
-class SyncedWindowDelegatesGetter;
-}
-
 namespace favicon {
 class FaviconService;
 }
 
 namespace history {
 class HistoryService;
 }
 
 namespace sync_sessions {
 
+class LocalSessionEventRouter;
+class SyncedWindowDelegatesGetter;
+
 // Interface for clients of a sync sessions datatype. Should be used as a getter
 // for services and data the Sync Sessions datatype depends on.
 class SyncSessionsClient {
  public:
   SyncSessionsClient();
   virtual ~SyncSessionsClient();
 
   // Getters for services that sessions depends on.
   virtual bookmarks::BookmarkModel* GetBookmarkModel() = 0;
   virtual favicon::FaviconService* GetFaviconService() = 0;
   virtual history::HistoryService* GetHistoryService() = 0;
 
   // Checks if the given url is considered interesting enough to sync. Most urls
   // are considered interesting. Examples of ones that are not are invalid urls,
   // files, and chrome internal pages.
   // TODO(zea): make this a standalone function if the url constants are
   // componentized.
   virtual bool ShouldSyncURL(const GURL& url) const = 0;
 
   // Returns the SyncedWindowDelegatesGetter for this client.
-  virtual browser_sync::SyncedWindowDelegatesGetter*
-  GetSyncedWindowDelegatesGetter() = 0;
+  virtual SyncedWindowDelegatesGetter* GetSyncedWindowDelegatesGetter() = 0;
 
   // Returns a LocalSessionEventRouter instance that is customized for the
   // embedder's context.
-  virtual std::unique_ptr<browser_sync::LocalSessionEventRouter>
+  virtual std::unique_ptr<LocalSessionEventRouter>
   GetLocalSessionEventRouter() = 0;
 
   // TODO(zea): add getters for the history and favicon services for the favicon
   // cache to consume once it's componentized.
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncSessionsClient);
 };
 
 }  // namespace sync_sessions
 
 #endif  // COMPONENTS_SYNC_SESSIONS_SYNC_SESSIONS_CLIENT_H_