[fuchsia] Add data reset handler API

Bug: 1146474, 1146480
Change-Id: I1262e7347769430f44b77fed1c0a9a261aa8a332
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2514879
Commit-Queue: Przemek Pietrzkiewicz <ppi@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824942}

fuchsia/BUILD.gn

@@ -15,6 +15,7 @@ fidl_library("cast_fidl") {
     "fidl/cast/application_context.fidl",
     "fidl/cast/application_controller.fidl",
     "fidl/cast/cors_exempt_headers.fidl",
+    "fidl/cast/data_reset.fidl",
     "fidl/cast/url_request_rewriter.fidl",
   ]
 

fuchsia/fidl/cast/data_reset.fidl

+// Copyright 2020 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.
+
+library chromium.cast;
+
+// Used to request that persistent data for components hosted by the Runner is
+// deleted.
+[Discoverable]
+protocol DataReset {
+  // Deletes all persistent data stored by the Runner.
+  //
+  // Active components hosted by the Runner will be terminated
+  // before any data is removed.
+  //
+  // Returns after deletion of persistent data completes or when an error
+  // occurs. The resulting |succeeded| is true if persistent data stored
+  // on behalf of components apps was successfully deleted, and false if
+  // the request could not be completed (for example, due to an I/O error).
+  [Transitional]
+  DeletePersistentData() -> (bool succeeded);
+};
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