Adding the possibility to build a closure from an ObjectiveC block.

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index 5d054f76035de6c950242d6feadb1a5ba1f36feb..7bba1b5e7bf3dff73db2403cf72d2903fab8dfb4 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -413,6 +413,7 @@
         'lazy_instance_unittest.cc',
         'linked_list_unittest.cc',
         'logging_unittest.cc',
+        'mac/bind_objc_block_unittest.mm',
         'mac/foundation_util_unittest.mm',
         'mac/mac_util_unittest.mm',
         'mac/objc_property_releaser_unittest.mm',
@@ -644,6 +645,7 @@
             # Pull in specific Mac files for iOS (which have been filtered out
             # by file name rules).
             ['include', '^mac/objc_property_releaser_unittest\\.mm$'],
+            ['include', '^mac/bind_objc_block_unittest\\.mm$'],
             ['include', '^sys_string_conversions_mac_unittest\\.mm$'],
           ],
         }],