bluetooth: Add tests for when frame reconnects during readValue

device/bluetooth/test/mock_bluetooth_device.cc

Index: device/bluetooth/test/mock_bluetooth_device.cc
diff --git a/device/bluetooth/test/mock_bluetooth_device.cc b/device/bluetooth/test/mock_bluetooth_device.cc
index 9315ff545117ca28eed98621618057aa87d7a008..6a3e25bbff00b7d397db8b74b9ffd0c7860fcde2 100644
--- a/device/bluetooth/test/mock_bluetooth_device.cc
+++ b/device/bluetooth/test/mock_bluetooth_device.cc
@@ -88,4 +88,15 @@ BluetoothRemoteGattService* MockBluetoothDevice::GetMockService(
   return nullptr;
 }
 
+void MockBluetoothDevice::PushPendingCallback(const base::Closure& callback) {
+  pending_callbacks_.push(callback);
+}
+
+void MockBluetoothDevice::RunPendingCallbacks() {
+  while (!pending_callbacks_.empty()) {
+    pending_callbacks_.front().Run();
+    pending_callbacks_.pop();
+  }
+}
+
 }  // namespace device