Bump Xcode compatibility version from 45 (Xcode 2.4-3.1) to 46 (Xcode 3.2).

pylib/gyp/generator/xcode.py

 # 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.
 
 import filecmp
 import gyp.common
 import gyp.xcodeproj_file
 import gyp.xcode_ninja
 import errno
 import os
@@ skipping 572 matching lines @@
   ninja_wrapper = params.get('flavor') == 'ninja'
   if ninja_wrapper:
     (target_list, target_dicts, data) = \
         gyp.xcode_ninja.CreateWrapper(target_list, target_dicts, data, params)
 
   options = params['options']
   generator_flags = params.get('generator_flags', {})
   parallel_builds = generator_flags.get('xcode_parallel_builds', True)
   serialize_all_tests = \
       generator_flags.get('xcode_serialize_all_test_runs', True)
-  project_version = generator_flags.get('xcode_project_version', None)
   skip_excluded_files = \
       not generator_flags.get('xcode_list_excluded_files', True)
   xcode_projects = {}
   for build_file, build_file_dict in data.iteritems():
     (build_file_root, build_file_ext) = os.path.splitext(build_file)
     if build_file_ext != '.gyp':
       continue
     xcodeproj_path = build_file_root + options.suffix + '.xcodeproj'
     if options.generator_output:
       xcodeproj_path = os.path.join(options.generator_output, xcodeproj_path)
     xcp = XcodeProject(build_file, xcodeproj_path, build_file_dict)
     xcode_projects[build_file] = xcp
     pbxp = xcp.project
 
     if parallel_builds:
       pbxp.SetProperty('attributes',
                        {'BuildIndependentTargetsInParallel': 'YES'})
-    if project_version:
-      xcp.project_file.SetXcodeVersion(project_version)
 
     # Add gyp/gypi files to project
     if not generator_flags.get('standalone'):
       main_group = pbxp.GetProperty('mainGroup')
       build_group = gyp.xcodeproj_file.PBXGroup({'name': 'Build'})
       main_group.AppendChild(build_group)
       for included_file in build_file_dict['included_files']:
         build_group.AddOrGetFileByPath(included_file, False)
 
   xcode_targets = {}
@@ skipping 629 matching lines @@
 
   for build_file in build_files:
     xcode_projects[build_file].Finalize1(xcode_targets, serialize_all_tests)
 
   for build_file in build_files:
     xcode_projects[build_file].Finalize2(xcode_targets,
                                          xcode_target_to_target_dict)
 
   for build_file in build_files:
     xcode_projects[build_file].Write()