Eliminate mojo:resource_provider

services/catalog/public/cpp/resource_loader.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_PUBLIC_CPP_RESOURCE_LOADER_H_
+#define SERVICES_CATALOG_PUBLIC_CPP_RESOURCE_LOADER_H_
+
+#include <map>
+#include <memory>
+#include <set>
+#include <string>
+
+#include "base/macros.h"
+#include "components/filesystem/public/interfaces/directory.mojom.h"
+
+namespace base {
+class File;
+}
+
+namespace catalog {
+
+// ResourceLoader asks the catalog (synchronously) to open the provided paths
+// and return the file handles. Use TakeFile() to retrieve a base::File to use
+// in client code.
+class ResourceLoader {
+ public:
+  ResourceLoader();
+  ~ResourceLoader();
+
+  // (Synchronously) opens all of the files in |paths| for reading. Use
+  // TakeFile() subsequently to obtain base::Files to use. Returns true if the
+  // sync operation completed, false if it did not.
+  bool OpenFiles(filesystem::DirectoryPtr directory,
+                 const std::set<std::string>& paths);
+
+  // Releases and returns the file wrapping the handle.
+  base::File TakeFile(const std::string& path);
+
+ private:
+  using ResourceMap = std::map<std::string, std::unique_ptr<base::File>>;
+
+  ResourceMap resource_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ResourceLoader);
+};
+
+}  // namespace
+
+#endif  // SERVICES_CATALOG_PUBLIC_CPP_RESOURCE_LOADER_H_