[Cronet] Add BUILD.gn for legacy ios/CrNet project.

components/cronet/tools/cr_cronet.py

 #!/usr/bin/python
 # 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.
 
 """
 cr_cronet.py - cr - like helper tool for cronet developers
 """
 
 import argparse
@@ skipping 70 matching lines @@
     test_target = 'cronet_test'
     gn_args = 'target_cpu = "x64" '
     gn_extra = '--ide=xcode'
     out_dir_suffix = '-iphonesimulator'
     if options.iphoneos:
       gn_args = 'target_cpu = "arm64" '
       out_dir_suffix = '-iphoneos'
   else:
     target_os = 'android'
     test_target = 'cronet_test_instrumentation_apk'
-    gn_args = 'use_errorprone_java_compiler=true '
+    gn_args = 'use_errorprone_java_compiler=true arm_use_neon=false '
     gn_extra = ''
     out_dir_suffix = ''
 
   gyp_defines = 'GYP_DEFINES="OS=' + target_os + ' enable_websockets=0 '+ \
       'disable_file_support=1 disable_ftp_support=1 '+ \
       'enable_errorprone=1 use_platform_icu_alternatives=1 ' + \
       'disable_brotli_filter=1 arm_neon=0"'
   gn_args += 'target_os="' + target_os + '" enable_websockets=false '+ \
       'disable_file_support=true disable_ftp_support=true '+ \
       'use_platform_icu_alternatives=true '+ \
-      'disable_brotli_filter=true is_component_build=false arm_use_neon=false'
+      'disable_brotli_filter=true is_component_build=false'
 
   extra_options = ' '.join(extra_options_list)
   if options.gn:
     out_dir_suffix += "-gn"
 
   if options.release:
     out_dir = 'out/Release' + out_dir_suffix
     release_arg = ' --release'
     gn_args += ' is_debug=false '
   else:
@@ skipping 33 matching lines @@
       return test_ios(out_dir, extra_options)
     if (options.command=='build-test'):
       return build(out_dir, test_target) or test_ios(out_dir, extra_options)
 
   parser.print_help()
   return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())