[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/fake_sync_sessions_client.cc

Index: components/sync_sessions/fake_sync_sessions_client.cc
diff --git a/components/sync_sessions/fake_sync_sessions_client.cc b/components/sync_sessions/fake_sync_sessions_client.cc
index 8632a9347d4e1fc0f5c4028ae8e5dbb259006747..9bdc8213a55c594d5895fccb506dbc5c6036a4de 100644
--- a/components/sync_sessions/fake_sync_sessions_client.cc
+++ b/components/sync_sessions/fake_sync_sessions_client.cc
@@ -28,12 +28,12 @@ bool FakeSyncSessionsClient::ShouldSyncURL(const GURL& url) const {
   return url.is_valid();
 }
 
-browser_sync::SyncedWindowDelegatesGetter*
+SyncedWindowDelegatesGetter*
 FakeSyncSessionsClient::GetSyncedWindowDelegatesGetter() {
   return nullptr;
 }
 
-std::unique_ptr<browser_sync::LocalSessionEventRouter>
+std::unique_ptr<LocalSessionEventRouter>
 FakeSyncSessionsClient::GetLocalSessionEventRouter() {
   return nullptr;
 }