services/resource_coordinator/public/mojom/coordination_unit_introspector.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 "services/resource_coordinator/public/mojom/coordination_unit.mojom";
import "mojo/public/mojom/base/process_id.mojom";
import "mojo/public/mojom/base/time.mojom";

// A |PageInfo| describes some metrics about a particular page with respect to
// a given process.
struct PageInfo {
  // Identifier to distinguish which URL this |PageInfo| corresponds to.
  int64 ukm_source_id;
  // Identifier to distinguish which tab this |PageInfo| corresponds to.
  uint64 tab_id;
  // True iff the process for this |PageInfo| hosts the main frame of the page.
  bool hosts_main_frame;
  bool is_visible;
  mojo_base.mojom.TimeDelta time_since_last_navigation;
  mojo_base.mojom.TimeDelta time_since_last_visibility_change;
};

struct ProcessInfo {
  mojo_base.mojom.ProcessId pid;
  array<PageInfo> page_infos;
  mojo_base.mojom.Time? launch_time;
};

interface CoordinationUnitIntrospector {
  // Returns an array that describes the current topology of Chrome, with
  // respect to the relationship between processes and hosted frame URLs.
  GetProcessToURLMap() => (array<ProcessInfo> process_infos);
};