Make memory pressure IPC accessible from content/public.

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../components/url_formatter/url_formatter.gyp:url_formatter',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
@@ skipping 158 matching lines @@
       'public/browser/javascript_dialog_manager.cc',
       'public/browser/javascript_dialog_manager.h',
       'public/browser/load_from_memory_cache_details.cc',
       'public/browser/load_from_memory_cache_details.h',
       'public/browser/load_notification_details.h',
       'public/browser/local_storage_usage_info.h',
       'public/browser/location_provider.h',
       'public/browser/media_capture_devices.h',
       'public/browser/media_device_id.cc',
       'public/browser/media_device_id.h',
+      'public/browser/memory_pressure.cc',
+      'public/browser/memory_pressure.h',
       'public/browser/message_port_delegate.h',
       'public/browser/message_port_provider.h',
       'public/browser/mojo_app_connection.h',
       'public/browser/native_web_keyboard_event.h',
       'public/browser/navigation_controller.cc',
       'public/browser/navigation_controller.h',
       'public/browser/navigation_details.cc',
       'public/browser/navigation_details.h',
       'public/browser/navigation_entry.h',
       'public/browser/navigation_handle.cc',
@@ skipping 2028 matching lines @@
     ['enable_webvr==1 and OS=="android"', {
       'sources': [
         'browser/vr/android/cardboard/cardboard_vr_device.cc',
         'browser/vr/android/cardboard/cardboard_vr_device.h',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.cc',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.h',
       ],
     }],
   ],
 }