arc: enable Android tracing in verified-boot mode

components/arc/arc_bridge_service.h

Index: components/arc/arc_bridge_service.h
diff --git a/components/arc/arc_bridge_service.h b/components/arc/arc_bridge_service.h
index 64852212e89552acef0aabcc23c7d59815d31f15..71ad9e4d3a7682e1c3630f72c65954be56c84b89 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -50,6 +50,7 @@ class PowerInstance;
 class PrintInstance;
 class ProcessInstance;
 class StorageManagerInstance;
+class TraceInstance;
 class TtsInstance;
 class VideoInstance;
 class WallpaperInstance;
@@ -130,6 +131,7 @@ class ArcBridgeService {
   InstanceHolder<mojom::StorageManagerInstance>* storage_manager() {
     return &storage_manager_;
   }
+  InstanceHolder<mojom::TraceInstance>* trace() { return &trace_; }
   InstanceHolder<mojom::TtsInstance>* tts() { return &tts_; }
   InstanceHolder<mojom::VideoInstance>* video() { return &video_; }
   InstanceHolder<mojom::WallpaperInstance>* wallpaper() { return &wallpaper_; }
@@ -199,6 +201,7 @@ class ArcBridgeService {
   InstanceHolder<mojom::PrintInstance> print_;
   InstanceHolder<mojom::ProcessInstance> process_;
   InstanceHolder<mojom::StorageManagerInstance> storage_manager_;
+  InstanceHolder<mojom::TraceInstance> trace_;
   InstanceHolder<mojom::TtsInstance> tts_;
   InstanceHolder<mojom::VideoInstance> video_;
   InstanceHolder<mojom::WallpaperInstance> wallpaper_;