[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/fake_sync_sessions_client.h

Index: components/sync_sessions/fake_sync_sessions_client.h
diff --git a/components/sync_sessions/fake_sync_sessions_client.h b/components/sync_sessions/fake_sync_sessions_client.h
index 3bd4cc7a2cc6b004d52ebdde1dc696a04d07f9ab..7b17f3a1d8896ea4019743d4ddbe001420931d2d 100644
--- a/components/sync_sessions/fake_sync_sessions_client.h
+++ b/components/sync_sessions/fake_sync_sessions_client.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_SYNC_SESSIONS_FAKE_SYNC_SESSIONS_CLIENT_H_
 #define COMPONENTS_SYNC_SESSIONS_FAKE_SYNC_SESSIONS_CLIENT_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "components/sync_sessions/sync_sessions_client.h"
 
@@ -21,10 +23,9 @@ class FakeSyncSessionsClient : public SyncSessionsClient {
   favicon::FaviconService* GetFaviconService() override;
   history::HistoryService* GetHistoryService() override;
   bool ShouldSyncURL(const GURL& url) const override;
-  browser_sync::SyncedWindowDelegatesGetter* GetSyncedWindowDelegatesGetter()
+  SyncedWindowDelegatesGetter* GetSyncedWindowDelegatesGetter() override;
+  std::unique_ptr<LocalSessionEventRouter> GetLocalSessionEventRouter()
       override;
-  std::unique_ptr<browser_sync::LocalSessionEventRouter>
-  GetLocalSessionEventRouter() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FakeSyncSessionsClient);