move V2 classes in chrome/engine to syncer_v2 namespace

sync/engine/entity_tracker.h

 // Copyright 2014 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 SYNC_ENGINE_ENTITY_TRACKER_H_
 #define SYNC_ENGINE_ENTITY_TRACKER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "sync/base/sync_export.h"
 #include "sync/protocol/sync.pb.h"
 
 namespace syncer_v2 {
 struct UpdateResponseData;
-}  // namespace syncer_v2
-
-namespace syncer {
 
 // Manages the pending commit and update state for an entity on the sync
 // thread.
 //
 // It should be considered a helper class internal to the
 // ModelTypeSyncWorker.
 //
 // Maintains the state associated with a particular sync entity which is
 // necessary for decision-making on the sync thread.  It can track pending
 // commit state, received update state, and can detect conflicts.
@@ skipping 54 matching lines @@
                              int64 sequence_number);
 
   // Handles receipt of an update from the server.
   void ReceiveUpdate(int64 version);
 
   // Handles the receipt of an pending update from the server.
   //
   // Returns true if the tracker decides this item is worth keeping.  Returns
   // false if the item is discarded, which could happen if the version number
   // is out of date.
-  bool ReceivePendingUpdate(const syncer_v2::UpdateResponseData& data);
+  bool ReceivePendingUpdate(const UpdateResponseData& data);
 
   // Functions to fetch the latest pending update.
   bool HasPendingUpdate() const;
-  syncer_v2::UpdateResponseData GetPendingUpdate() const;
+  UpdateResponseData GetPendingUpdate() const;
 
   // Clears the pending update.  Allows us to resume regular commit behavior.
   void ClearPendingUpdate();
 
  private:
   // Initializes received update state.  Does not initialize state related to
   // pending commits and sets |is_commit_pending_| to false.
   EntityTracker(const std::string& id,
                 const std::string& client_tag_hash,
                 int64 highest_commit_response_version,
@@ skipping 52 matching lines @@
   int64 base_version_;
   base::Time ctime_;
   base::Time mtime_;
   std::string non_unique_name_;
   bool deleted_;
   sync_pb::EntitySpecifics specifics_;
 
   // An update for this item which can't be applied right now.  The presence of
   // an pending update prevents commits.  As of this writing, the only source
   // of pending updates is updates we can't decrypt right now.
-  scoped_ptr<syncer_v2::UpdateResponseData> pending_update_;
+  scoped_ptr<UpdateResponseData> pending_update_;
 
   DISALLOW_COPY_AND_ASSIGN(EntityTracker);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_ENTITY_TRACKER_H_