Revert of Global Resource Coordinator: Basic service internals

services/resource_coordinator/public/interfaces/coordination_unit.mojom

-// Copyright 2017 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.
-
-module resource_coordinator.mojom;
-
-import "events.mojom";
-
-// Any new type here needs to be mirrored between coordination_unit_types.h and
-// coordination_unit.mojom, and have mappings between the two defined in
-// coordination_unit_struct_traits.h/.cc (see comment in coordination_unit_id.h).
-enum CoordinationUnitType {
-  kWebContents,
-  kFrame,
-  kNavigation,
-  kProcess,
-};
-
-struct CoordinationUnitID {
-  CoordinationUnitType type;
-  int64 id;
-};
-
-struct CoordinationPolicy {
-  bool use_background_priority;
-};
-
-interface CoordinationPolicyCallback {
-  SetCoordinationPolicy(CoordinationPolicy policy);
-};
-
-interface CoordinationUnit {
-  SendEvent(Event event);
-
-  // Mainly used to force a round-trip to the service over the pipe for
-  // a specific unit, so we don't have to deal with possibly-not-yet-created
-  // children in AddChild()
-  GetID() => (CoordinationUnitID id);
-
-  Duplicate(CoordinationUnit& request);
-  // child_id must represent a CU which already exists service-side,
-  // and can't be a direct ascendent or descendent of the current unit.
-  AddChild(CoordinationUnitID child_id);
-  SetCoordinationPolicyCallback(CoordinationPolicyCallback callback);
-};