Re-enable nacl_integration on Mac.

chrome/test/nacl_test_injection/buildbot_nacl_integration.py

Index: chrome/test/nacl_test_injection/buildbot_nacl_integration.py
diff --git a/chrome/test/nacl_test_injection/buildbot_nacl_integration.py b/chrome/test/nacl_test_injection/buildbot_nacl_integration.py
index 83adbd8e3b114c3f8817b412b85befe4a9dde5ff..b659c0443d094590365280f512dd10fdf8dd9c52 100755
--- a/chrome/test/nacl_test_injection/buildbot_nacl_integration.py
+++ b/chrome/test/nacl_test_injection/buildbot_nacl_integration.py
@@ -12,11 +12,6 @@ def Main(args):
   pwd = os.environ.get('PWD', '')
   is_integration_bot = 'nacl-chrome' in pwd
 
-  if not is_integration_bot and sys.platform == 'darwin':
-    # TODO: Reenable.
-    sys.stdout.write('Skipping nacl_integration, see http://crbug.com/105406\n')
-    return
-
   # On the main Chrome waterfall, we may need to control where the tests are
   # run.
   # If there is serious skew in the PPAPI interface that causes all of