Host-side implementation of ARC audio bridge.

components/arc/common/arc_bridge.mojom

Index: components/arc/common/arc_bridge.mojom
diff --git a/components/arc/common/arc_bridge.mojom b/components/arc/common/arc_bridge.mojom
index 1ada544e7d8a311ccb301e97480fca0a61b22ef9..ee7fe26a9187100c80f35f4ecb8671a0153c383d 100644
--- a/components/arc/common/arc_bridge.mojom
+++ b/components/arc/common/arc_bridge.mojom
@@ -5,6 +5,7 @@
 module arc;
 
 import "app.mojom";
+import "audio.mojom";
 import "auth.mojom";
 import "clipboard.mojom";
 import "crash_collector.mojom";
@@ -26,6 +27,9 @@ interface ArcBridgeHost {
   // Notifies Chrome that the AppInstance interface is ready.
   OnAppInstanceReady@100(AppInstance instance_ptr);
 
+  // Notifies Chrome that the AudioInstance interface is ready.
+  [MinVersion=8] OnAudioInstanceReady@115(AudioInstance instance_ptr);
+
   // Notifies Chrome that the AuthInstance interface is ready.
   [MinVersion=1] OnAuthInstanceReady@106(AuthInstance instance_ptr);