Apply artificial memory pressure when backgrounded.

content/content_renderer.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': [
     '../jingle/jingle.gyp:jingle_glue',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
     '../third_party/WebKit/public/blink.gyp:blink',
@@ skipping 260 matching lines @@
     'renderer/fetchers/multi_resolution_image_resource_fetcher.h',
     'renderer/fetchers/resource_fetcher.cc',
     'renderer/fetchers/resource_fetcher.h',
     'renderer/ime_event_guard.cc',
     'renderer/ime_event_guard.h',
     'renderer/render_frame_impl.cc',
     'renderer/render_frame_impl.h',
     'renderer/render_process.h',
     'renderer/render_process_impl.cc',
     'renderer/render_process_impl.h',
+    'renderer/render_process_visibility_manager.cc',
+    'renderer/render_process_visibility_manager.h',
     'renderer/render_thread_impl.cc',
     'renderer/render_thread_impl.h',
     'renderer/render_view_impl.cc',
     'renderer/render_view_impl.h',
     'renderer/render_view_impl_android.cc',
     'renderer/render_view_impl_params.cc',
     'renderer/render_view_impl_params.h',
     'renderer/render_view_linux.cc',
     'renderer/render_view_mouse_lock_dispatcher.cc',
     'renderer/render_view_mouse_lock_dispatcher.h',
@@ skipping 207 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }