[Service Manager] Get rid of dynamic service discovery

services/catalog/reader.h

-// 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.
-
-#ifndef SERVICES_CATALOG_READER_H_
-#define SERVICES_CATALOG_READER_H_
-
-#include <map>
-#include <memory>
-#include <string>
-
-#include "base/callback.h"
-#include "base/files/file_path.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "services/service_manager/public/interfaces/resolver.mojom.h"
-
-namespace base {
-class SequencedWorkerPool;
-class SingleThreadTaskRunner;
-class Value;
-}
-
-namespace catalog {
-
-class Entry;
-class EntryCache;
-class ManifestProvider;
-
-// Responsible for loading manifests & building the Entry data structures.
-class Reader {
- public:
-  using ReadManifestCallback = base::Callback<void(std::unique_ptr<Entry>)>;
-  using CreateEntryForNameCallback =
-      service_manager::mojom::Resolver::ResolveServiceNameCallback;
-
-  // Construct a Reader over a static manifest. This Reader never performs
-  // file I/O.
-  Reader(std::unique_ptr<base::Value> static_manifest, EntryCache* cache);
-
-  Reader(base::SequencedWorkerPool* worker_pool,
-         ManifestProvider* manifest_provider);
-  Reader(base::SingleThreadTaskRunner* task_runner,
-         ManifestProvider* manifest_provider);
-  ~Reader();
-
-  // Scans the contents of |package_dir|, reading all application manifests and
-  // populating |cache|. Runs |read_complete_closure| when done.
-  void Read(const base::FilePath& package_dir,
-            EntryCache* cache,
-            const base::Closure& read_complete_closure);
-
-  // Returns an Entry for |name| via |callback|, assuming a manifest file in the
-  // canonical location
-  void CreateEntryForName(
-      const std::string& name,
-      EntryCache* cache,
-      const CreateEntryForNameCallback& entry_created_callback);
-
-  // Overrides the package name used for a specific service name.
-  void OverridePackageName(const std::string& service_name,
-                           const std::string& package_name);
-
-  // Overrides the manifest path used for a specific service name.
-  void OverrideManifestPath(const std::string& service_name,
-                            const base::FilePath& path);
-
- private:
-  explicit Reader(ManifestProvider* manifest_provider);
-
-  void OnReadManifest(EntryCache* cache,
-                      const CreateEntryForNameCallback& entry_created_callback,
-                      std::unique_ptr<Entry> entry);
-
-  const bool using_static_catalog_ = false;
-  base::FilePath system_package_dir_;
-  scoped_refptr<base::TaskRunner> file_task_runner_;
-  ManifestProvider* const manifest_provider_;
-  std::map<std::string, std::string> package_name_overrides_;
-  std::map<std::string, base::FilePath> manifest_path_overrides_;
-  base::WeakPtrFactory<Reader> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(Reader);
-};
-
-}  // namespace catalog
-
-#endif  // SERVICES_CATALOG_READER_H_