Implement BluetoothRemoteGattServiceWin and related unit tests

device/bluetooth/bluetooth_adapter_win.h

Index: device/bluetooth/bluetooth_adapter_win.h
diff --git a/device/bluetooth/bluetooth_adapter_win.h b/device/bluetooth/bluetooth_adapter_win.h
index 26c895b09598b7b73a980b0339210a50a26c3b90..bb8f16b8ef0a2bc0f8ab762f015421faa009eef6 100644
--- a/device/bluetooth/bluetooth_adapter_win.h
+++ b/device/bluetooth/bluetooth_adapter_win.h
@@ -93,6 +93,10 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterWin
     return socket_thread_;
   }
 
+  scoped_refptr<BluetoothTaskManagerWin> GetWinBluetoothTaskManager() {
+    return task_manager_;
+  }
+
  protected:
   // BluetoothAdapter:
   void RemovePairingDelegateInternal(
@@ -153,6 +157,9 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterWin
 
   base::ThreadChecker thread_checker_;
 
+  // Flag indicating a device update must be forced in DevicesPolled.
+  bool force_update_device_for_test_;
+
   // NOTE: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothAdapterWin> weak_ptr_factory_;