mash: Exit main process if content_browser service crashes

chrome/app/mash/mash_runner.cc

Index: chrome/app/mash/mash_runner.cc
diff --git a/chrome/app/mash/mash_runner.cc b/chrome/app/mash/mash_runner.cc
index e436fbd92f3dbb085ba22ab8f9138f98e3eac7dc..7628bc688a5251484997242b92103e726398d458 100644
--- a/chrome/app/mash/mash_runner.cc
+++ b/chrome/app/mash/mash_runner.cc
@@ -131,7 +131,8 @@ void OnInstanceQuitInMain(base::RunLoop* run_loop,
   DCHECK(run_loop);
 
   if (identity.name() != mash::common::GetWindowManagerServiceName() &&
-      identity.name() != ui::mojom::kServiceName) {
+      identity.name() != ui::mojom::kServiceName &&
+      identity.name() != content::mojom::kBrowserServiceName) {
     return;
   }
 
@@ -204,6 +205,7 @@ int MashRunner::RunServiceManagerInMain() {
   context_->connector()->Connect(ui::mojom::kServiceName);
   context_->connector()->Connect(mash::common::GetWindowManagerServiceName());
   context_->connector()->Connect(mash::quick_launch::mojom::kServiceName);
+  context_->connector()->Connect(content::mojom::kBrowserServiceName);
 
   run_loop.Run();