Added memory usage function to base.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 680 matching lines @@
       "cpu_time.h",
       "fakeclock.cc",
       "fakeclock.h",
       "fakenetwork.h",
       "fakesslidentity.h",
       "firewallsocketserver.cc",
       "firewallsocketserver.h",
       "gunit.h",
       "httpserver.cc",
       "httpserver.h",
+      "memory_usage.cc",
+      "memory_usage.h",
       "natserver.cc",
       "natserver.h",
       "natsocketfactory.cc",
       "natsocketfactory.h",
       "nattypes.cc",
       "nattypes.h",
       "proxyserver.cc",
       "proxyserver.h",
       "sigslottester.h",
       "sigslottester.h.pump",
@@ skipping 196 matching lines @@
 
 if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
   }
 }