Checkpoint work to get GN builds working on Android.

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")
 
 component("base") {
   sources = [
     "third_party/dmg_fp/dmg_fp.h",
     "third_party/dmg_fp/g_fmt.cc",
@@ skipping 663 matching lines @@
     "win/startup_information.cc",
     "win/startup_information.h",
     "win/win_util.cc",
     "win/win_util.h",
     "win/windows_version.cc",
     "win/windows_version.h",
     "win/wrapped_window_proc.cc",
     "win/wrapped_window_proc.h",
   ]
 
+  if (is_android) {
+    sources -= [
+      "debug/stack_trace_posix.cc",
+    ]
+
+    # TODO(dpranke): crbug.com/360936.
+    # These are disabled until we have JNI support on Android.
+    sources -= [
+      "android/activity_status.cc",
+      "android/base_jni_registrar.cc",
+      "android/base_jni_registrar.h",
+      "android/build_info.cc",
+      "android/build_info.h",
+      "android/cpu_features.cc",
+      "android/important_file_writer_android.cc",
+      "android/memory_pressure_listener_android.cc",
+      "android/path_service_android.cc",
+      "android/path_utils.cc",
+      "android/sys_utils.cc",
+      "android/trace_event_binding.cc",
+      "message_loop/message_pump_android.cc",
+      "power_monitor/power_monitor_device_source_android.cc",
+      "threading/platform_thread_android.cc",
+    ]
+  }
+
   # TODO(brettw) I don't understand the conditions this file is used.
   sources -= [ "files/file_path_watcher_stub.cc" ]
 
   sources -= [
     "process/process_handle_freebsd.cc",
     "process/process_handle_openbsd.cc",
     "process/process_iterator_freebsd.cc",
     "process/process_iterator_openbsd.cc",
     "process/process_metrics_freebsd.cc",
     "process/process_metrics_openbsd.cc",
@@ skipping 200 matching lines @@
   #    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   #    'msvs_disabled_warnings': [
   #      4267,
   #    ],
   #  }],
   #],
   #'variables': {
   #  'optimize': 'max',
   #},
 }