Add unit test for ArcBluetoothBridge and TypeConverter

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 3d719694314ee0219463b873144255e23136cbde..f25aacae94649315879a035f08491fe7774f6e9e 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -192,9 +192,7 @@ class ArcBridgeService : public mojom::ArcBridgeHost {
   mojom::AppInstance* app_instance() { return app_ptr_.get(); }
   mojom::AudioInstance* audio_instance() { return audio_ptr_.get(); }
   mojom::AuthInstance* auth_instance() { return auth_ptr_.get(); }
-  mojom::BluetoothInstance* bluetooth_instance() {
-    return bluetooth_ptr_.get();
-  }
+  virtual mojom::BluetoothInstance* bluetooth_instance();

[Luis Héctor Chávez, 2016/06/27 20:19:56]

ouch.

you can't have name this "bluetooth_instance" if you don't just inline the
method, which means that you'll need to change it to GetBluetoothInstance(). But
that will make it inconsistent with all the other methods. Let me see if there's
a way around it.

   mojom::ClipboardInstance* clipboard_instance() {
     return clipboard_ptr_.get();
   }
@@ -229,7 +227,7 @@ class ArcBridgeService : public mojom::ArcBridgeHost {
 
   int32_t app_version() const { return app_ptr_.version(); }
   int32_t audio_version() const { return audio_ptr_.version(); }
-  int32_t bluetooth_version() const { return bluetooth_ptr_.version(); }
+  virtual int32_t bluetooth_version() const;
   int32_t auth_version() const { return auth_ptr_.version(); }
   int32_t clipboard_version() const { return clipboard_ptr_.version(); }
   int32_t crash_collector_version() const {