Copy sharing/internal, sharing/common and sharing/scheduling to github.

- Move Abseil pin to same as that used in Chromium.
- Disabled layering_check due to build failure in absl.

PiperOrigin-RevId: 596631921

sharing/internal/api/shell.h

@@ -0,0 +1,43 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef THIRD_PARTY_NEARBY_SHARING_INTERNAL_API_SHELL_H_
+#define THIRD_PARTY_NEARBY_SHARING_INTERNAL_API_SHELL_H_
+
+#include <filesystem>  // NOLINT(build/c++17)
+#include <functional>
+
+#include "absl/status/status.h"
+
+namespace nearby {
+namespace api {
+
+// Shell defines interfaces to interact with platform core features.
+class Shell {
+ public:
+  virtual ~Shell() = default;
+
+  // Opens the |path| file or folder with default application. if |path|
+  // is a directory, will open the folder by explore, otherwise it will
+  // try to open the file with application supports it. |callback| is called
+  // when the open operation completed, and absl::StatusCodes::kOk returned
+  // only when open the path successfully.
+  virtual void Open(const std::filesystem::path& path,
+                    std::function<void(absl::Status)> callback) = 0;
+};
+
+}  // namespace api
+}  // namespace nearby
+
+#endif  // THIRD_PARTY_NEARBY_SHARING_INTERNAL_API_SHELL_H_