feat: add electron.safeStorage encryption API (#30020)

* feat: add SafeStorage api; first commit

* chore: rename files to fit semantically

* chore: add linkedBindings

* chore: fix function signatures

* chore: refactor eisCookieEncryptionEnabled() fuse

* chore: create test file

* chore: add tests and documentation

* chore: add copyright and lint

* chore: add additional tests

* chore: fix constructor

* chore: commit for pair programming

* wip: commit for keeley pairing

* chore: docs change and code cleanup

* chore: add linux import

* chore: add description to documentation

* chore: fixing tests

* chore: modify behaviour to not allow unencrypted strings as decyption input

* fix add patch for enabling default v11 encryption on Linux

* chore: remove file after each test

* chore: fix patch

* chore: remove chromium patch

* chore: add linux specific tests

* chore: fix path

* chore: add checker for linuux file deletion

* chore: add dcheck back

* chore: remove reference to headless mode

* chore: remove tests for linux

* chore: edit commit message

* chore: refactor safeStorage to not be a class

* chore: remove static variable from header

* chore:  spec file remove settimeout

Co-authored-by: VerteDinde <keeleymhammond@gmail.com>

shell/browser/api/electron_api_safe_storage.h

@@ -0,0 +1,25 @@
+// Copyright (c) 2021 Slack Technologies, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_BROWSER_API_ELECTRON_API_SAFE_STORAGE_H_
+#define SHELL_BROWSER_API_ELECTRON_API_SAFE_STORAGE_H_
+
+#include "base/dcheck_is_on.h"
+
+namespace electron {
+
+namespace safestorage {
+
+// Used in a DCHECK to validate that our assumption that the network context
+// manager has initialized before app ready holds true. Only used in the
+// testing build
+#if DCHECK_IS_ON()
+void SetElectronCryptoReady(bool ready);
+#endif
+
+}  // namespace safestorage
+
+}  // namespace electron
+
+#endif  // SHELL_BROWSER_API_ELECTRON_API_SAFE_STORAGE_H_