Tether: record each type of host connection result.

chromeos/components/tether/mock_host_connection_metrics_logger.h

Index: chromeos/components/tether/mock_host_connection_metrics_logger.h
diff --git a/chromeos/components/tether/mock_host_connection_metrics_logger.h b/chromeos/components/tether/mock_host_connection_metrics_logger.h
new file mode 100644
index 0000000000000000000000000000000000000000..569c05fffcb2294f57acc622d668e642aa13db5c
--- /dev/null
+++ b/chromeos/components/tether/mock_host_connection_metrics_logger.h
@@ -0,0 +1,31 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMEOS_COMPONENTS_TETHER_MOCK_HOST_CONNECTION_METRICS_LOGGER_H_
+#define CHROMEOS_COMPONENTS_TETHER_MOCK_HOST_CONNECTION_METRICS_LOGGER_H_
+
+#include "chromeos/components/tether/host_connection_metrics_logger.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace chromeos {
+
+namespace tether {
+
+class MockHostConnectionMetricsLogger : public HostConnectionMetricsLogger {
+ public:
+  MockHostConnectionMetricsLogger();
+  ~MockHostConnectionMetricsLogger() override;
+
+  MOCK_METHOD1(RecordConnectionToHostResult,
+               void(HostConnectionMetricsLogger::ConnectionToHostResult));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockHostConnectionMetricsLogger);
+};
+
+}  // namespace tether
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_COMPONENTS_TETHER_MOCK_HOST_CONNECTION_METRICS_LOGGER_H_