move V2 classes in chrome/engine to syncer_v2 namespace

sync/test/engine/injectable_sync_context_proxy.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_TEST_ENGINE_INJECTABLE_SYNC_CONTEXT_PROXY_H_
 #define SYNC_TEST_ENGINE_INJECTABLE_SYNC_CONTEXT_PROXY_H_
 
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/non_blocking_sync_common.h"
 #include "sync/internal_api/public/sync_context_proxy.h"
 
-namespace syncer {
+namespace syncer_v2 {
 
 class ModelTypeSyncProxyImpl;
 class ModelTypeSyncWorker;
 
 // A SyncContextProxy implementation that, when a connection request is made,
 // initalizes a connection to a previously injected ModelTypeSyncProxyImpl.
-class InjectableSyncContextProxy : public syncer_v2::SyncContextProxy {
+class InjectableSyncContextProxy : public SyncContextProxy {
  public:
   explicit InjectableSyncContextProxy(ModelTypeSyncWorker* worker);
   ~InjectableSyncContextProxy() override;
 
   void ConnectTypeToSync(
-      ModelType type,
-      const syncer_v2::DataTypeState& data_type_state,
-      const syncer_v2::UpdateResponseDataList& pending_updates,
-      const base::WeakPtr<syncer::ModelTypeSyncProxyImpl>& type_sync_proxy)
-      override;
-  void Disconnect(ModelType type) override;
-  scoped_ptr<syncer_v2::SyncContextProxy> Clone() const override;
+      syncer::ModelType type,
+      const DataTypeState& data_type_state,
+      const UpdateResponseDataList& pending_updates,
+      const base::WeakPtr<ModelTypeSyncProxyImpl>& type_sync_proxy) override;
+  void Disconnect(syncer::ModelType type) override;
+  scoped_ptr<SyncContextProxy> Clone() const override;
 
   ModelTypeSyncWorker* GetWorker();
 
  private:
   // A flag to ensure ConnectTypeToSync is called at most once.
   bool is_worker_connected_;
 
   // The ModelTypeSyncProxy's contract expects that it gets to own this object,
   // so we can retain only a non-owned pointer to it.
   //
   // This is very unsafe, but we can get away with it since these tests are not
   // exercising the proxy <-> worker connection code.
   ModelTypeSyncWorker* worker_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_TEST_ENGINE_INJECTABLE_SYNC_CONTEXT_PROXY_H_