Introduce gin_shell

gin/modules/file_module_provider.h

Index: gin/modules/file_module_provider.h
diff --git a/gin/modules/file_module_provider.h b/gin/modules/file_module_provider.h
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+// Copyright 2013 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 GIN_MODULES_FILE_MODULE_PROVIDER_H_
+#define GIN_MODULES_FILE_MODULE_PROVIDER_H_
+
+#include <set>
+#include <string>
+#include "base/files/file_path.h"
+#include "gin/runner.h"
+
+namespace gin {
+
+class FileModuleProvider {
+ public:
+  explicit FileModuleProvider(const base::FilePath& base);
+  virtual ~FileModuleProvider();
+
+  void AttempToLoadModules(Runner* runner, const std::set<std::string>& ids);
+
+ private:
+  base::FilePath base_;
+  std::set<std::string> attempted_ids_;
+
+  DISALLOW_COPY_AND_ASSIGN(FileModuleProvider);
+};
+
+}  // namespace gin
+
+#endif  // GIN_MODULES_FILE_MODULE_PROVIDER_H_