MemoryPressure: sends the signal to the renderer.

content/content_child.gypi

 # Copyright 2013 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',
     '../components/tracing.gyp:tracing',
     '../ui/ui.gyp:ui',
     '../url/url.gyp:url_lib',
@@ skipping 32 matching lines @@
     'child/indexed_db/indexed_db_dispatcher.cc',
     'child/indexed_db/indexed_db_dispatcher.h',
     'child/indexed_db/indexed_db_message_filter.cc',
     'child/indexed_db/indexed_db_message_filter.h',
     'child/indexed_db/proxy_webidbcursor_impl.cc',
     'child/indexed_db/proxy_webidbcursor_impl.h',
     'child/indexed_db/proxy_webidbdatabase_impl.cc',
     'child/indexed_db/proxy_webidbdatabase_impl.h',
     'child/indexed_db/proxy_webidbfactory_impl.cc',
     'child/indexed_db/proxy_webidbfactory_impl.h',
+    'child/memory_pressure_message_filter.cc',
+    'child/memory_pressure_message_filter.h',
     'child/np_channel_base.cc',
     'child/np_channel_base.h',
     'child/npobject_base.h',
     'child/npobject_proxy.cc',
     'child/npobject_proxy.h',
     'child/npobject_stub.cc',
     'child/npobject_stub.h',
     'child/npobject_util.cc',
     'child/npobject_util.h',
     'child/plugin_message_generator.cc',
@@ skipping 37 matching lines @@
     }, {  # OS!="ios"
       'dependencies': [
         '../third_party/WebKit/public/blink.gyp:blink',
         '../third_party/npapi/npapi.gyp:npapi',
         '../webkit/base/webkit_base.gyp:webkit_base',
         '../webkit/support/webkit_support.gyp:glue_child',
       ],
     }],
   ],
 }