aura_builder target needs to work on Mac

build/all.gyp

Index: build/all.gyp
diff --git a/build/all.gyp b/build/all.gyp
index 8fc61ace66d1becb2c394363aa91304f81d35a64..6604f728266d080585e1f36e2fb8dc97d2f93c36 100644
--- a/build/all.gyp
+++ b/build/all.gyp
@@ -605,6 +605,16 @@
                 '../ui/ui.gyp:gfx_unittests',
               ],
             }],
+            ['OS=="mac"', {
+              # Exclude dependencies that are not currently implemented.
+              'dependencies!': [
+                '../ash/ash.gyp:aura_shell_unittests',
+                '../chrome/chrome.gyp:chrome',
+                '../chrome/chrome.gyp:unit_tests',
+                '../chrome/chrome.gyp:ui_tests',
+                '../ui/views/views.gyp:views_unittests',
+              ],
+            }],
           ],
         },
       ],  # targets