Gyp changes for ninja iOS build.

build/ios/mac_build.gypi

 # 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.
 
 # Xcode throws an error if an iOS target depends on a Mac OS X target. So
 # any place a utility program needs to be build and run, an action is
 # used to run ninja as script to work around this.
 # Example:
 # {
 #   'target_name': 'foo',
@@ skipping 21 matching lines @@
 #         '<@(ninja_cmd)',
 #         # All the targets to build.
 #         'foo1',
 #         'foo2',
 #       ],
 #     },
 #   ],
 # }
 {
   'variables': {
+    'variables': {
+     'parent_generator%': '<(GENERATOR)',
+    },
+    'parent_generator%': '<(parent_generator)',
     # Common ninja command line flags.
     'ninja_cmd': [
       # Bounce through clean_env to clean up the environment so things
       # set by the iOS build don't pollute the Mac build.
       '<(DEPTH)/build/ios/clean_env.py',
       # ninja must be found in the PATH.
       'ADD_TO_PATH=<!(echo $PATH)',
       'ninja',
       '-C',
       '<(ninja_product_dir)',
     ],
 
     # Common syntax to rerun gyp to generate the Mac projects.
     're_run_gyp': [
       'build/gyp_chromium',
       '--depth=.',
       # Don't use anything set for the iOS side of things.
       '--ignore-environment',
       # Generate for ninja
       '--format=ninja',
       # Generate files into xcodebuild/ninja
       '-Goutput_dir=xcodebuild/<(ninja_output_dir)',
       # nacl isn't in the iOS checkout, make sure it's turned off
       '-Ddisable_nacl=1',
       # Add a variable to handle specific cases for mac_build.
       '-Dios_mac_build=1',
       # Pass through the Mac SDK version.
       '-Dmac_sdk=<(mac_sdk)',
+      '-Dparent_generator=<(parent_generator)'
     ],
 
     # Rerun gyp for each of the projects needed. This is what actually
     # generates the projects on disk.
     're_run_gyp_execution':
       '<!(cd <(DEPTH) && <@(re_run_gyp) <@(re_run_targets))',
   },
   # Since these are used to generate things needed by other targets, make
   # them hard dependencies so they are always built first.
   'hard_dependency': 1,
 }