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 2923afcb75c417a4a28004f212e1dc2e864262f8..1852834e6f015b6f7c1d9a6486d487f241bce965 100644
--- a/chrome/app/mash/mash_runner.cc
+++ b/chrome/app/mash/mash_runner.cc
@@ -132,7 +132,8 @@ 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;
   }
 
@@ -207,6 +208,7 @@ 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();