Extract client handing from ChildMemoryCoordinatorImpl

components/memory_coordinator.gypi

 # Copyright (c) 2016 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.
 
 {
   'targets': [
     {
       # GN version: //components/memory_coordinator/public/interfaces
       'target_name': 'memory_coordinator_mojo_bindings',
       'type': 'static_library',
       'sources': [
         'memory_coordinator/public/interfaces/child_memory_coordinator.mojom',
         'memory_coordinator/public/interfaces/memory_coordinator.mojom',
       ],
       'variables': {
         'use_new_wrapper_types': 'false',
       },
       'includes': [ '../mojo/mojom_bindings_generator.gypi' ],
     },
     {
       # GN version: //components/memory_coordinator/common
       'target_name': 'memory_coordinator_common',
       'type': 'static_library',
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         'memory_coordinator_mojo_bindings',
       ],
       'sources': [
+        'memory_coordinator/common/client_registry.cc',
+        'memory_coordinator/common/client_registry.h',
         'memory_coordinator/common/memory_coordinator_client.h',
         'memory_coordinator/common/memory_coordinator_features.cc',
         'memory_coordinator/common/memory_coordinator_features.h',
       ],
     },
     {
       # GN version: //components/memory_coordinator/child
       'target_name': 'memory_coordinator_child',
       'type': 'static_library',
       'dependencies': [
@@ skipping 15 matching lines @@
         'memory_coordinator_common',
         'memory_coordinator_mojo_bindings',
       ],
       'sources': [
         'memory_coordinator/browser/memory_coordinator.cc',
         'memory_coordinator/browser/memory_coordinator.h',
       ],
     },
   ],
 }