Consolidate code monitoring low memory kills and OOM kills to MemoryKillsMonitor on ChromeOS.

chrome/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 2753 matching lines @@
       "media_galleries/win/mtp_device_object_entry.cc",
       "media_galleries/win/mtp_device_object_entry.h",
       "media_galleries/win/mtp_device_object_enumerator.cc",
       "media_galleries/win/mtp_device_object_enumerator.h",
       "media_galleries/win/mtp_device_operations_util.cc",
       "media_galleries/win/mtp_device_operations_util.h",
       "media_galleries/win/portable_device_map_service.cc",
       "media_galleries/win/portable_device_map_service.h",
       "media_galleries/win/snapshot_file_details.cc",
       "media_galleries/win/snapshot_file_details.h",
+      "memory/memory_kills_histogram.h",
+      "memory/memory_kills_monitor.cc",
+      "memory/memory_kills_monitor.h",
       "memory/oom_memory_details.cc",
       "memory/oom_memory_details.h",
       "memory/tab_manager.cc",
       "memory/tab_manager.h",
       "memory/tab_manager_delegate_chromeos.cc",
       "memory/tab_manager_delegate_chromeos.h",
       "memory/tab_manager_observer.cc",
       "memory/tab_manager_observer.h",
       "memory/tab_manager_web_contents_data.cc",
       "memory/tab_manager_web_contents_data.h",
@@ skipping 1627 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }