[Sync] Move //components/sync to the syncer namespace, take 2.

components/sync/core/non_blocking_sync_common.h

Index: components/sync/core/non_blocking_sync_common.h
diff --git a/components/sync/core/non_blocking_sync_common.h b/components/sync/core/non_blocking_sync_common.h
index 6b8b7920b2540d1a95fadb6f24d7137112f3263a..fe2e3443334f2b9bf142b127265859593f9e055c 100644
--- a/components/sync/core/non_blocking_sync_common.h
+++ b/components/sync/core/non_blocking_sync_common.h
@@ -14,7 +14,7 @@
 #include "components/sync/api/entity_data.h"
 #include "components/sync/protocol/sync.pb.h"
 
-namespace syncer_v2 {
+namespace syncer {
 
 static const int64_t kUncommittedVersion = -1;
 
@@ -60,6 +60,6 @@ typedef std::vector<CommitRequestData> CommitRequestDataList;
 typedef std::vector<CommitResponseData> CommitResponseDataList;
 typedef std::vector<UpdateResponseData> UpdateResponseDataList;
 
-}  // namespace syncer_v2
+}  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_CORE_NON_BLOCKING_SYNC_COMMON_H_