Migrate ChromeOS to base::MemoryPressureMonitor

base/BUILD.gn

 # Copyright (c) 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 145 matching lines @@
     "bind_internal_win.h",
     "bits.h",
     "build_time.cc",
     "build_time.h",
     "callback.h",
     "callback_helpers.cc",
     "callback_helpers.h",
     "callback_internal.cc",
     "callback_internal.h",
     "cancelable_callback.h",
-    "chromeos/memory_pressure_observer_chromeos.cc",
-    "chromeos/memory_pressure_observer_chromeos.h",
+    "chromeos/memory_pressure_monitor_chromeos.cc",
+    "chromeos/memory_pressure_monitor_chromeos.h",
     "command_line.cc",
     "command_line.h",
     "compiler_specific.h",
     "containers/adapters.h",
     "containers/hash_tables.h",
     "containers/linked_list.h",
     "containers/mru_cache.h",
     "containers/small_map.h",
     "containers/stack_container.h",
     "cpu.cc",
@@ skipping 910 matching lines @@
     "bind_unittest.cc",
     "bind_unittest.nc",
     "bits_unittest.cc",
     "build_time_unittest.cc",
     "callback_helpers_unittest.cc",
     "callback_list_unittest.cc",
     "callback_list_unittest.nc",
     "callback_unittest.cc",
     "callback_unittest.nc",
     "cancelable_callback_unittest.cc",
-    "chromeos/memory_pressure_observer_chromeos_unittest.cc",
+    "chromeos/memory_pressure_monitor_chromeos_unittest.cc",
     "command_line_unittest.cc",
     "containers/adapters_unittest.cc",
     "containers/hash_tables_unittest.cc",
     "containers/linked_list_unittest.cc",
     "containers/mru_cache_unittest.cc",
     "containers/small_map_unittest.cc",
     "containers/stack_container_unittest.cc",
     "cpu_unittest.cc",
     "debug/crash_logging_unittest.cc",
     "debug/debugger_unittest.cc",
@@ skipping 368 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }