[Memory UMA] Return the extra_processes_dump map as part of the ResponseCallback

mojo/common/process_id.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 mojo.common.mojom;
+
+struct ProcessId {
+  // This is the storage for the pid, on windows tje pid is a DWORD an the

[Ken Rockot(use gerrit already), 2017/04/18 22:11:24]

nit: tje=the, an=and

[fmeawad, 2017/04/19 21:07:21]

Done.

+  // value can be DWORD_MAX which maps gracefully to uint32 while on linux
+  // the pid is a signed int with a max value of 2^22.
+  uint32 pid;
+};