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

services/resource_coordinator/public/interfaces/memory/memory_instrumentation.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 memory_instrumentation.mojom;
 
+import "mojo/common/process_id.mojom";
+
 enum DumpType {
   PERIODIC_INTERVAL,
   EXPLICITLY_TRIGGERED,
   PEAK_MEMORY_USAGE
 };
 
 enum LevelOfDetail {
   BACKGROUND,
   LIGHT,
   DETAILED
@@ skipping 12 matching lines @@
 struct ChromeMemDump {
   uint32 malloc_total_kb = 0;
   uint32 partition_alloc_total_kb = 0;
   uint32 blink_gc_total_kb = 0;
   uint32 v8_total_kb = 0;
 };
 
 struct MemoryDumpCallbackResult {
   OSMemDump os_dump;
   ChromeMemDump chrome_dump;
-}; 
+  map<mojo.common.mojom.ProcessId, OSMemDump> extra_processes_dump;
+};
 
 // There should be at most one implementation of this interface per process.
 interface ProcessLocalDumpManager {
   // When successful, the dump is appended in the process-local trace buffer of
   // the target process and an ACK. A summary of the dump is also returned in
   // case of success.
   RequestProcessMemoryDump(RequestArgs args) =>
       (uint64 dump_guid, bool success, MemoryDumpCallbackResult? result);
 };
 
 // Memory Infra service implements this interface. ProcessLocalDumpManagers
 // register themselves using the RegisterProcessLocalDumpManager method and
 // suggest a global memory dump using the RequestGlobalMemoryDump method.
 interface Coordinator {
   RegisterProcessLocalDumpManager(ProcessLocalDumpManager local_manager);
   RequestGlobalMemoryDump(RequestArgs args) => (uint64 dump_guid, bool success);
 };