Hook up RSSI and host transmit power Bluetooth device properties for ChromeOS.

device/bluetooth/bluetooth_device_chromeos.h

Index: device/bluetooth/bluetooth_device_chromeos.h
diff --git a/device/bluetooth/bluetooth_device_chromeos.h b/device/bluetooth/bluetooth_device_chromeos.h
index 41327899e4545975e962c974cdb462c125e4b00f..a7fa42838b5231fb190f51501c978e457bf1f7ff 100644
--- a/device/bluetooth/bluetooth_device_chromeos.h
+++ b/device/bluetooth/bluetooth_device_chromeos.h
@@ -146,6 +146,13 @@ class BluetoothDeviceChromeOS
   void SetTrusted();
   void OnSetTrusted(bool success);
 
+  // Internal method to enable the connection monitor when connecting to this
+  // device. The connection monitor mode tracks the connection RSSI and TX
+  // power of the connection.
+  void StartConnectionMonitor();
+  void OnStartConnectionMonitorError(const std::string& error_name,
+                                     const std::string& error_message);
+
   // Called by dbus:: on completion of the D-Bus method call to disconnect the
   // device.
   void OnDisconnect(const base::Closure& callback);