Make the Pepepr test run on the mac.

BUG=none
TESTS=none

Review URL: http://codereview.chromium.org/546041

git-svn-id: http://src.chromium.org/svn/trunk/src/build@36264 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -59,6 +59,7 @@
         ['OS=="mac"', {
           'dependencies': [
             '../third_party/ocmock/ocmock.gyp:*',
+            '../webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp:*',
           ],
         }],
         ['OS=="linux"', {