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 3f4a5f5a38dbb5a62b98f646a2626f39d4189d38..f64ce707898bd4799d70661957ac950c2720bbfe 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -42,6 +42,7 @@ class PowerInstance;
 class PrintInstance;
 class ProcessInstance;
 class StorageManagerInstance;
+class TraceInstance;
 class TtsInstance;
 class VideoInstance;
 class WallpaperInstance;
@@ -98,6 +99,7 @@ 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_; }
@@ -124,6 +126,7 @@ 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_;