Change TypeConverter<X,Y>::ConvertFrom and ConvertTo into a single symmetric

mojo/services/public/cpp/view_manager/lib/view_manager_client_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 "mojo/services/public/cpp/view_manager/lib/view_manager_client_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
@@ skipping 283 matching lines @@
 // ViewManagerClientImpl, ViewManagerClient implementation:
 
 void ViewManagerClientImpl::OnEmbed(
     ConnectionSpecificId connection_id,
     const String& creator_url,
     ViewDataPtr root_data,
     InterfaceRequest<ServiceProvider> service_provider) {
   if (!connected_) {
     connected_ = true;
     connection_id_ = connection_id;
-    creator_url_ = TypeConverter<String, std::string>::ConvertFrom(creator_url);
+    creator_url_ = String::From(creator_url);
   } else {
     DCHECK_EQ(connection_id_, connection_id);
     DCHECK_EQ(creator_url_, creator_url);
   }
 
   // A new root must not already exist as a root or be contained by an existing
   // hierarchy visible to this view manager.
   View* root = AddViewToViewManager(this, NULL, root_data->view_id,
                                     root_data->bounds.To<gfx::Rect>());
   roots_.push_back(root);
@@ skipping 124 matching lines @@
                     base::Unretained(this));
 }
 
 base::Callback<void(ErrorCode)>
     ViewManagerClientImpl::ActionCompletedCallbackWithErrorCode() {
   return base::Bind(&ViewManagerClientImpl::OnActionCompletedWithErrorCode,
                     base::Unretained(this));
 }
 
 }  // namespace mojo