mojo leveldb: Get profile and leveldb connected to DOMStorageContext.

components/profile_service/profile_service_impl.cc

 // Copyright 2016 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 "components/profile_service/profile_service_impl.h"
 
+#include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "components/filesystem/directory_impl.h"
 #include "components/filesystem/lock_table.h"
 #include "mojo/shell/public/cpp/connection.h"
+#include "mojo/shell/public/cpp/message_loop_ref.h"
 
 namespace profile {
 
 ProfileServiceImpl::ProfileServiceImpl(
     mojo::Connection* connection,
     mojo::InterfaceRequest<ProfileService> request,
+    scoped_ptr<mojo::MessageLoopRef> ref,
     base::FilePath base_profile_dir,

[michaeln, 2016/03/05 01:38:54]

const ref for the FilePath&

     filesystem::LockTable* lock_table)
-    : binding_(this, std::move(request)),
+    : message_loop_ref_(std::move(ref)),
+      binding_(this, std::move(request)),
       lock_table_(lock_table),
       path_(base_profile_dir) {
   if (!base::PathExists(path_))
     base::CreateDirectory(path_);
 }
 
-ProfileServiceImpl::~ProfileServiceImpl() {
-}
+ProfileServiceImpl::~ProfileServiceImpl() {}
 
 void ProfileServiceImpl::GetDirectory(
-    mojo::InterfaceRequest<filesystem::Directory> request) {
+    mojo::InterfaceRequest<filesystem::Directory> request,
+    const GetDirectoryCallback& callback) {
   new filesystem::DirectoryImpl(std::move(request),
                                 path_,
                                 scoped_ptr<base::ScopedTempDir>(),
                                 lock_table_);
+  callback.Run(filesystem::FileError::OK);

[michaeln, 2016/03/05 01:38:54]

If this method can never fail, we don't need a error code and what is the
purpose of the completion callback?

[Elliot Glaysher, 2016/03/10 21:00:35]

Problem: This method can never fail. Resolution: replaced it with a method which
can fail. :p

(aka, the create a subdirectory variant mentioned earlier.)

 }
 
 }  // namespace profile