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

chrome/browser/ui/ash/ash_util.h

Index: chrome/browser/ui/ash/ash_util.h
diff --git a/chrome/browser/ui/ash/ash_util.h b/chrome/browser/ui/ash/ash_util.h
index 3cce86d425739adff7717db86a4749421a561048..110482e91d0f84b492001a1eea459ff660df414a 100644
--- a/chrome/browser/ui/ash/ash_util.h
+++ b/chrome/browser/ui/ash/ash_util.h
@@ -9,6 +9,15 @@ namespace ui {
 class Accelerator;
 }  // namespace ui
 
+namespace ash_util {
+
+// Returns the name of the ash service depending on whether the browser is
+// running in classic ash or mash.
+const char* GetAshServiceName();
+
+}  // namespace ash_util
+
+// TODO(jamescook): Change this namespace to ash_util.
 namespace chrome {
 
 // Returns true if Ash should be run at startup.