media: Register MojoMediaApplication to run in Utility process.

chromecast/browser/BUILD.gn

Index: chromecast/browser/BUILD.gn
diff --git a/chromecast/browser/BUILD.gn b/chromecast/browser/BUILD.gn
index 358bff1f0f737c669ff7a026de93183a8e00259f..ba5be41dd19cf355cdbe18bc83a5770b03f03809 100644
--- a/chromecast/browser/BUILD.gn
+++ b/chromecast/browser/BUILD.gn
@@ -111,6 +111,14 @@ source_set("browser") {
 
     deps += [ "//components/metrics:serialization" ]
   }
+
+  if (enable_mojo_media != "none") {
+    configs += [ "//media/mojo/services:enable_mojo_media_config" ]
+  }
+
+  if (enable_mojo_media == "utility") {
+    deps += [ "//media/mojo/services:application" ]
+  }
 }
 
 source_set("test_support") {