Fix and enable mojo:media_pipeline_integration_apptests.

mojo/tools/data/apptests

Index: mojo/tools/data/apptests
diff --git a/mojo/tools/data/apptests b/mojo/tools/data/apptests
index a2fa12b13726eb78105b32d5a8807587a65c662f..b530665376ad25f5ca6ca2fb499f2263a0a0bf21 100644
--- a/mojo/tools/data/apptests
+++ b/mojo/tools/data/apptests
@@ -84,12 +84,14 @@ if config.target_os != config.OS_ANDROID:
       'args': ['--use-x11-test-config',
                '--override-use-gl-with-osmesa-for-tests']
     },
-    # TODO(xhwang): Fix and enable mojo:media_pipeline_integration_apptests.
-    # http://crbug.com/501417
     {
       'test': 'mojo:media_apptests',
       'type': 'gtest_isolated',
     },
+    {
+      'test': 'mojo:media_pipeline_integration_apptests',
+      'type': 'gtest_isolated',
+    },
     # TODO(crbug.com/560626): Fix and enable mus_apptests on Android.
     mus_apptests,
     {