[iOS] Set --auto-activate-custom-fonts for ibtool compile.

pylib/gyp/mac_tool.py

 #!/usr/bin/env python
 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Utility functions to perform Xcode-style build steps.
 
 These functions are executed via gyp-mac-tool when using the Makefile generator.
 """
 
@@ skipping 62 matching lines @@
     """Compiles a XIB file with ibtool into a binary plist in the bundle."""
 
     # ibtool sometimes crashes with relative paths. See crbug.com/314728.
     base = os.path.dirname(os.path.realpath(__file__))
     if os.path.relpath(source):
       source = os.path.join(base, source)
     if os.path.relpath(dest):
       dest = os.path.join(base, dest)
 
     args = ['xcrun', 'ibtool', '--errors', '--warnings', '--notices',
-        '--output-format', 'human-readable-text', '--compile', dest, source]
+        '--auto-activate-custom-fonts', '--output-format',

[Nico, 2016/01/26 22:55:11]

do we want this on os x too?

[sdefresne, 2016/01/27 09:24:11]

What is the earliest version of Xcode supporting this flag? Do we still want to
support that version of Xcode with gyp?

+        'human-readable-text', '--compile', dest, source]
     ibtool_section_re = re.compile(r'/\*.*\*/')
     ibtool_re = re.compile(r'.*note:.*is clipping its content')
     ibtoolout = subprocess.Popen(args, stdout=subprocess.PIPE)
     current_section_header = None
     for line in ibtoolout.stdout:
       if ibtool_section_re.match(line):
         current_section_header = line
       elif not ibtool_re.match(line):
         if current_section_header:
           sys.stdout.write(current_section_header)
@@ skipping 484 matching lines @@
         data = data.replace('$(%s)' % key, value)
       return data
     if isinstance(data, list):
       return [self._ExpandVariables(v, substitutions) for v in data]
     if isinstance(data, dict):
       return {k: self._ExpandVariables(data[k], substitutions) for k in data}
     return data
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))