arc: enable Android tracing from chrome://tracing in dev mode

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 7b8a9c528d46024fd76927f23b5627f4cb0a5be0..1ad0fe37b4b4e3ce837e002ecff4ac1ffaeec387 100644
--- a/components/arc/common/arc_bridge.mojom
+++ b/components/arc/common/arc_bridge.mojom
@@ -26,13 +26,14 @@ import "power.mojom";
 import "print.mojom";
 import "process.mojom";
 import "storage_manager.mojom";
+import "tracing.mojom";
 import "tts.mojom";
 import "video.mojom";
 import "wallpaper.mojom";
 
-// Next MinVersion: 22
+// Next MinVersion: 23
 // Deprecated method IDs: 101, 105
-// Next method ID: 128
+// Next method ID: 129
 interface ArcBridgeHost {
   // Keep the entries alphabetical. In order to do so without breaking
   // compatibility with the ARC instance, explicitly assign each interface a
@@ -110,6 +111,9 @@ interface ArcBridgeHost {
   // Notifies Chrome that the StorageManagerInstance interface is ready.
   [MinVersion=12] OnStorageManagerInstanceReady@118(StorageManagerInstance instance_ptr);
 
+  // Notifies Chrome that the TracingInstance interface is ready.
+  [MinVersion=22] OnTracingInstanceReady@128(TracingInstance instance_ptr);
+
   // Notifies Chrome that the TtsInstance interface is ready.
   [MinVersion=17] OnTtsInstanceReady@123(TtsInstance instance_ptr);