Adds SDCH config files for iOS.

sdch/sdch.gyp

 # Copyright (c) 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 37 matching lines @@
         'open-vcdiff/src',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           'open-vcdiff/src',
         ],
       },
       'conditions': [
         [ 'OS == "linux" or OS == "android"', { 'include_dirs': [ 'linux' ] } ],
         [ 'os_bsd==1 or OS=="solaris"', { 'include_dirs': [ 'bsd' ] } ],
+        [ 'OS == "ios"', { 'include_dirs': [ 'ios' ] } ],
         [ 'OS == "mac"', { 'include_dirs': [ 'mac' ] } ],
         [ 'OS == "win"', { 'include_dirs': [ 'open-vcdiff/vsprojects' ] } ],
       ],
     },
   ],
 }