Move fetching logic out of ApplicationManager, eliminate url mappings.

mandoline/app/desktop/launcher_process.cc

Index: mandoline/app/desktop/launcher_process.cc
diff --git a/mandoline/app/desktop/launcher_process.cc b/mandoline/app/desktop/launcher_process.cc
index 132d0333a2873dc2d1edb16d373942c9f698037b..4473b0d8620e28f44f9dc0c1c0d9557e16ed1b0d 100644
--- a/mandoline/app/desktop/launcher_process.cc
+++ b/mandoline/app/desktop/launcher_process.cc
@@ -13,6 +13,7 @@
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
+#include "base/path_service.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/trace_event/trace_event.h"
 #include "components/tracing/trace_config_file.h"
@@ -99,7 +100,9 @@ int LauncherProcessMain(int argc, char** argv) {
 
   // We want the runner::Context to outlive the MessageLoop so that pipes are
   // all gracefully closed / error-out before we try to shut the Context down.
-  mojo::runner::Context shell_context;
+  base::FilePath shell_dir;
+  PathService::Get(base::DIR_MODULE, &shell_dir);
+  mojo::runner::Context shell_context(shell_dir);
   InitCoreServicesForContext(&shell_context);
   {
     base::MessageLoop message_loop;