Mac: Let interactive_ui_tests load nibs.

chrome/test/interactive_ui/interactive_ui_tests.gypi

Index: chrome/test/interactive_ui/interactive_ui_tests.gypi
diff --git a/chrome/test/interactive_ui/interactive_ui_tests.gypi b/chrome/test/interactive_ui/interactive_ui_tests.gypi
index 2614f471ca1c158f5d3d861d8555e7cd617b591a..33529d536948ed707a3dadec8b0e094492fc6d57 100644
--- a/chrome/test/interactive_ui/interactive_ui_tests.gypi
+++ b/chrome/test/interactive_ui/interactive_ui_tests.gypi
@@ -97,6 +97,8 @@
         '<(DEPTH)/chrome/test/interactive_ui/view_event_test_base.cc',
         '<(DEPTH)/chrome/test/interactive_ui/view_event_test_base.h',
       ],
+      # See comment about the same line in chrome/chrome_tests.gypi.
+      'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
     }],  # OS=="mac"
     ['toolkit_views==1', {
       'dependencies': [