mash: Have chrome set itself as a controller interface for changing volume

chrome/browser/ui/ash/ash_util.cc

Index: chrome/browser/ui/ash/ash_util.cc
diff --git a/chrome/browser/ui/ash/ash_util.cc b/chrome/browser/ui/ash/ash_util.cc
index 33c69c1abb7dc72dc2d98442f6e26230980b3d90..4609b798fcf30f25527331ce5e2b303ff2ce8bd3 100644
--- a/chrome/browser/ui/ash/ash_util.cc
+++ b/chrome/browser/ui/ash/ash_util.cc
@@ -8,9 +8,23 @@
 #include "ash/common/wm_shell.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/ash/ash_init.h"
+#include "content/public/common/service_names.mojom.h"
 #include "services/service_manager/runner/common/client_util.h"
 #include "ui/aura/window_event_dispatcher.h"
 
+namespace ash_util {
+
+const char* GetAshServiceName() {
+  // Under mash the ash process provides the service.
+  if (chrome::IsRunningInMash())
+    return "ash";
+
+  // Under classic ash the browser process provides the service.
+  return content::mojom::kBrowserServiceName;
+}
+
+}  // namespace ash_util
+
 namespace chrome {
 
 bool ShouldOpenAshOnStartup() {