Add SwapMetricsObserverMac

content/browser/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//gpu/vulkan/features.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
 import("//printing/features/features.gni")
@@ skipping 977 matching lines @@
     "memory/memory_monitor_android.h",
     "memory/memory_monitor_win.cc",
     "memory/memory_monitor_win.h",
     "memory/memory_pressure_controller_impl.cc",
     "memory/memory_pressure_controller_impl.h",
     "memory/swap_metrics_observer.cc",
     "memory/swap_metrics_observer.h",
     "memory/swap_metrics_observer_linux.cc",
     "memory/swap_metrics_observer_linux.h",
     "memory/swap_metrics_observer_mac.cc",
+    "memory/swap_metrics_observer_mac.h",
     "memory/swap_metrics_observer_win.cc",
     "message_port_provider.cc",
     "mime_registry_impl.cc",
     "mime_registry_impl.h",
     "net/browser_online_state_observer.cc",
     "net/browser_online_state_observer.h",
     "net/network_errors_listing_ui.cc",
     "net/network_errors_listing_ui.h",
     "net/quota_policy_cookie_store.cc",
     "net/quota_policy_cookie_store.h",
@@ skipping 1085 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }