memory-infra: Plumb platform_private_footprint to service

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

Index: services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.h
diff --git a/services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.h b/services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.h
index 55d916b9137ea944032107fe18838f8643b7ee2e..6a2e6fa627ce28ca557fbcc3b6b168308573b5ba 100644
--- a/services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.h
+++ b/services/resource_coordinator/public/cpp/memory/memory_instrumentation_struct_traits.h
@@ -92,6 +92,18 @@ struct SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_MEMORY_EXPORT
 
 template <>
 struct SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_MEMORY_EXPORT StructTraits<
+    memory_instrumentation::mojom::PlatformPrivateFootprintDataView,
+    base::trace_event::ProcessMemoryTotals::PrivateMemoryFootprint> {
+  static uint32_t resident_set_kb(
+      const base::trace_event::MemoryDumpCallbackResult::OSMemDump& args) {
+    return args.resident_set_kb;
+  }
+  static bool Read(memory_instrumentation::mojom::OSMemDumpDataView input,
+                   base::trace_event::MemoryDumpCallbackResult::OSMemDump* out);
+};
+
+template <>
+struct SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_MEMORY_EXPORT StructTraits<
     memory_instrumentation::mojom::MemoryDumpCallbackResultDataView,
     base::trace_event::MemoryDumpCallbackResult> {
   static base::trace_event::MemoryDumpCallbackResult::OSMemDump os_dump(