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

pylib/gyp/xcodeproj_file.py

Index: pylib/gyp/xcodeproj_file.py
diff --git a/pylib/gyp/xcodeproj_file.py b/pylib/gyp/xcodeproj_file.py
index 69f7c10c70c4f1ee44d34b6e41640557b34ede11..034a0d2d4fcc23ae097c615d23699a07f61ed055 100644
--- a/pylib/gyp/xcodeproj_file.py
+++ b/pylib/gyp/xcodeproj_file.py
@@ -2863,27 +2863,10 @@ class XCProjectFile(XCObject):
   _schema.update({
     'archiveVersion': [0, int,        0, 1, 1],
     'classes':        [0, dict,       0, 1, {}],
-    'objectVersion':  [0, int,        0, 1, 45],
+    'objectVersion':  [0, int,        0, 1, 46],
     'rootObject':     [0, PBXProject, 1, 1],
   })
 
-  def SetXcodeVersion(self, version):
-    version_to_object_version = {
-      '2.4': 45,
-      '3.0': 45,
-      '3.1': 45,
-      '3.2': 46,
-    }
-    if not version in version_to_object_version:
-      supported_str = ', '.join(sorted(version_to_object_version.keys()))
-      raise Exception(
-          'Unsupported Xcode version %s (supported: %s)' %
-          ( version, supported_str ) )
-    compatibility_version = 'Xcode %s' % version
-    self._properties['rootObject'].SetProperty('compatibilityVersion',
-                                               compatibility_version)
-    self.SetProperty('objectVersion', version_to_object_version[version]);
-
   def ComputeIDs(self, recursive=True, overwrite=True, hash=None):
     # Although XCProjectFile is implemented here as an XCObject, it's not a
     # proper object in the Xcode sense, and it certainly doesn't have its own