[GRC] Coordination Unit Graph Observer

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";
 import "mojo/common/values.mojom";
 
 // Any new type here needs to be mirrored between coordination_unit_types.h and
@@ skipping 16 matching lines @@
 };
 
 interface CoordinationPolicyCallback {
   SetCoordinationPolicy(CoordinationPolicy policy);
 };
 
 // Defines the Storage property keys that can be get/set on the
 // CoordinationUnitImpl internal key-value store.
 enum PropertyType {
   kTest,
+  kProcessCPUUsage,
 };
 
 // Key-value pair that corresponds to an entry in the CoordinationUnitImpl's
 // internal key-value store
 struct Property {
   PropertyType property;
   mojo.common.mojom.Value value;
 };
 
 interface CoordinationUnit {
@@ skipping 12 matching lines @@
   AddChild(CoordinationUnitID child_id);
 
   // child_id must represent a CU that already exists service-side
   // and is a direct descendent of the current unit.
   RemoveChild(CoordinationUnitID child_id);
   SetCoordinationPolicyCallback(CoordinationPolicyCallback callback);
 
   // Sets a property on the CoordinationUnitImpl's internal key-value store.
   SetProperty(Property property);
 };