Explicitly declare mojo_application_base->mojom dep in gyp

Explicitly declare mojo_application_base->mojom dep in gyp

mojo/public/cpp/application/application_connection.h includes
service_provider.mojom.h, so it must explicitly declare a hard
dependency in gyp on the mojom target that produces this header or the
header might not exist on disk when targets that include
application_connection.h are compiled. This does so by exporting
the application_bindings_mojom dependent settings (which includes the
hard_dependency bit) from mojo_application_bindings,
which mojo_application_base depends on and exports.

(port of https://codereview.chromium.org/733513003)

TBR=viettrungluu@chromium.org

[jamesr, 2014-11-14 21:23:16]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-11-14 21:23:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/726933006/1

[viettrungluu, 2014-11-14 21:38:09]

lgtm

[commit-bot: I haz the power, 2014-11-14 21:50:54]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-11-14 21:50:55]

Try jobs failed on following builders:
  android_dbg_tests_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tes...)

[jamesr, 2014-11-14 22:58:39]

OK that didn't link on android or windows. PTAL

[jamesr, 2014-11-15 00:53:09]

OK, this has green try runs but the underlying mojo roll was reverted in
chromium.  Will land this in mojo and then roll with the rest of it.