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

services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.cc

 // 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.
 
 #include "services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.h"
 
 #include "base/trace_event/memory_dump_request_args.h"
+#include "mojo/common/common_custom_types_struct_traits.h"
 #include "services/resource_coordinator/public/interfaces/memory/memory_instrumentation.mojom.h"
 
 namespace mojo {
 
 // static
 memory_instrumentation::mojom::DumpType
 EnumTraits<memory_instrumentation::mojom::DumpType,
            base::trace_event::MemoryDumpType>::
     ToMojom(base::trace_event::MemoryDumpType type) {
   switch (type) {
@@ skipping 110 matching lines @@
 // static
 bool StructTraits<
     memory_instrumentation::mojom::MemoryDumpCallbackResultDataView,
     base::trace_event::MemoryDumpCallbackResult>::
     Read(memory_instrumentation::mojom::MemoryDumpCallbackResultDataView input,
          base::trace_event::MemoryDumpCallbackResult* out) {
   if (!input.ReadChromeDump(&out->chrome_dump))
     return false;
   if (!input.ReadOsDump(&out->os_dump))
     return false;
+  if (!input.ReadExtraProcessesDump(&out->extra_processes_dump))
+    return false;
   return true;
 }
 
 }  // namespace mojo