Move Leopard compatible block code to content/.

content/content_tests.gypi

Index: content/content_tests.gypi
diff --git a/content/content_tests.gypi b/content/content_tests.gypi
index fd79b78338b137af515161d576fabcd55a54b055..5146d05afa8478defa79d2fac4f48f36804a8488 100644
--- a/content/content_tests.gypi
+++ b/content/content_tests.gypi
@@ -117,6 +117,7 @@
         'browser/gpu/gpu_blacklist_unittest.cc',
         'browser/in_process_webkit/webkit_context_unittest.cc',
         'browser/in_process_webkit/webkit_thread_unittest.cc',
+        'browser/mac/closure_blocks_leopard_compat_unittest.cc',
         'browser/mach_broker_mac_unittest.cc',
         'browser/renderer_host/gtk_key_bindings_handler_unittest.cc',
         'browser/renderer_host/media/audio_input_device_manager_unittest.cc',
@@ -181,6 +182,11 @@
             ['exclude', '^browser/renderer_host/gtk_key_bindings_handler_unittest.cc'],
           ],
         }],
+        ['OS=="mac"', {
+          'dependencies': [
+            'closure_blocks_leopard_compat',
+          ],
+        }],
       ],
     },
   ],