Consolidates view_manager typedefs

mojo/services/public/cpp/view_manager/lib/view_private.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 MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_LIB_VIEW_PRIVATE_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_LIB_VIEW_PRIVATE_H_
 
 #include "base/basictypes.h"
 
 #include "mojo/services/public/cpp/view_manager/view.h"
 
 namespace mojo {
 namespace view_manager {
 
 class ViewPrivate {
  public:
   explicit ViewPrivate(View* view);
   ~ViewPrivate();
 
   static View* LocalCreate();
   void LocalDestroy() {
     view_->LocalDestroy();
   }
 
-  void set_id(TransportViewId id) { view_->id_ = id; }
+  void set_id(Id id) { view_->id_ = id; }
   void set_node(ViewTreeNode* node) { view_->node_ = node; }
 
   ViewManager* view_manager() { return view_->manager_; }
   void set_view_manager(ViewManager* manager) {
     view_->manager_ = manager;
   }
 
   ObserverList<ViewObserver>* observers() { return &view_->observers_; }
 
  private:
   View* view_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewPrivate);
 };
 
 }  // namespace view_manager
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_LIB_VIEW_PRIVATE_H_