aura_builder target needs to work on Mac

Extends 'aura_builder' target to work on Mac.  This excludes bits
that are not currently working.

To build:
  ash_shell
  aura_demo
  aura_unittests
  compositor_unittests

To run:
  compositor_unittests
  webkit_unit_tests

Gyp flags:
  'use_aura': 1

BUG=110632, 110627
TEST=Compile 'aura_builder' target on Mac with 'use_aura' bit set.
R=cmp@chromium.org, oshima@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9226024

git-svn-id: http://src.chromium.org/svn/trunk/src/build@118535 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

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