Added media.gyp dependency into content/content_test.gypi.

content/public/test/content_test_suite_base.cc includes media/base/media.h
but its gyp file is missing media.gyp dependency. This is a spin-off CL from
11075006.

BUG=


Review URL: https://chromiumcodereview.appspot.com/11066124

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161800 0039d316-1c4b-4281-b951-d872f2087c98

content/content_tests.gypi

@@ -13,6 +13,7 @@
         'content_app',
         'content_browser',
         'content_common',
+        '../media/media.gyp:media',
         '../net/net.gyp:net_test_support',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',