Add Link-Time Optimizations support for Android.

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'variables': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 2580 matching lines @@
       'include_dirs': [
         '..',
         '<(INTERMEDIATE_DIR)',
         # Needed by pepper_flash_component_installer.cc.
         '<(SHARED_INTERMEDIATE_DIR)',
       ],
       'export_dependent_settings': [
         '../components/components.gyp:dom_distiller_core',
         '../sync/sync.gyp:sync',
       ],
+      'includes': [
+        # Disable LTO due to undefined reference
+        # crbug.com/422252
+        '../build/android/disable_lto.gypi',
+      ],
       'conditions': [
         ['OS != "ios"', {
           'sources': [
             '<@(chrome_browser_ui_non_ios_sources)',
             '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/omnibox/omnibox.mojom.cc',
           ],
           'dependencies': [
             'chrome_web_ui_mojo_bindings.gyp:web_ui_mojo_bindings',
             'debugger',
             'installer_util',
@@ skipping 385 matching lines @@
         }],
         ['OS!="android" and OS!="ios"', {
           'dependencies': [
             '../device/bluetooth/bluetooth.gyp:device_bluetooth',
           ],
         }],
       ],
     },
   ],
 }