Revert "Remove 'mojo_' prefix from all mojo applications."

mojo/public/mojo.gni

Index: mojo/public/mojo.gni
diff --git a/url/config.gni b/mojo/public/mojo.gni
similarity index 60%
copy from url/config.gni
copy to mojo/public/mojo.gni
index 42d335fb6228281bd4def9b2d131f0b68e13d618..5ff29890a3402a05fe434bf866c2a4ef7ee9e865 100644
--- a/url/config.gni
+++ b/mojo/public/mojo.gni
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 declare_args() {
-  # Switches to using platform functions instead of ICU on Android.
-  use_icu_alternatives_on_android = false
+  # Whether to use a prebuilt mojo_shell binary instead of one built from
+  # source.
+  use_prebuilt_mojo_shell = false
 }