Adds a ServerViewObserver interface

services/view_manager/view_manager_service_impl.cc

 // 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.
 
 #include "services/view_manager/view_manager_service_impl.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
@@ skipping 83 matching lines @@
   }
   if (root_.get() && root_->connection_id == connection->id())
     root_.reset();
 }
 
 mojo::ErrorCode ViewManagerServiceImpl::CreateView(const ViewId& view_id) {
   if (view_id.connection_id != id_)
     return mojo::ERROR_CODE_ILLEGAL_ARGUMENT;
   if (view_map_.find(view_id.view_id) != view_map_.end())
     return mojo::ERROR_CODE_VALUE_IN_USE;
-  view_map_[view_id.view_id] = new ServerView(connection_manager_, view_id);
+  view_map_[view_id.view_id] = connection_manager_->CreateServerView(view_id);
   known_views_.insert(ViewIdToTransportId(view_id));
   return mojo::ERROR_CODE_NONE;
 }
 
 bool ViewManagerServiceImpl::AddView(const ViewId& parent_id,
                                      const ViewId& child_id) {
   ServerView* parent = GetView(parent_id);
   ServerView* child = GetView(child_id);
   if (parent && child && child->parent() != parent &&
       !child->Contains(parent) && access_policy_->CanAddView(parent, child)) {
@@ skipping 530 matching lines @@
 }
 
 bool ViewManagerServiceImpl::IsViewRootOfAnotherConnectionForAccessPolicy(
     const ServerView* view) const {
   ViewManagerServiceImpl* connection =
       connection_manager_->GetConnectionWithRoot(view->id());
   return connection && connection != this;
 }
 
 }  // namespace view_manager