Example Bluetooth ARC++ test changes.

components/arc/test/fake_arc_bridge_service.h

Index: components/arc/test/fake_arc_bridge_service.h
diff --git a/components/arc/test/fake_arc_bridge_service.h b/components/arc/test/fake_arc_bridge_service.h
index f66b872db70f611ad78e816541a89d23193f7ae6..e1c1b12dee82e456524b7ac2f75389d439249307 100644
--- a/components/arc/test/fake_arc_bridge_service.h
+++ b/components/arc/test/fake_arc_bridge_service.h
@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "components/arc/arc_bridge_service.h"
+#include "components/arc/test/fake_bluetooth_instance.h"
 
 namespace arc {
 
@@ -22,6 +23,8 @@ class FakeArcBridgeService : public ArcBridgeService {
   void SetDetectedAvailability(bool availability) override;
   void HandleStartup() override;
   void Shutdown() override;
+  mojom::BluetoothInstance* bluetooth_instance() override;
+  int32_t bluetooth_version() const override;
 
   void SetReady();
 
@@ -29,7 +32,12 @@ class FakeArcBridgeService : public ArcBridgeService {
 
   bool HasObserver(const Observer* observer);
 
+  void set_bluetooth_version(int32_t version) { bluetooth_version_ = version; }
+
  private:
+  std::unique_ptr<FakeBluetoothInstance> bluetooth_instance_;
+  int32_t bluetooth_version_;
+
   DISALLOW_COPY_AND_ASSIGN(FakeArcBridgeService);
 };