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

device/bluetooth/bluetooth_device.h

 // Copyright (c) 2012 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 DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 386 matching lines @@
       const BluetoothOutOfBandPairingData& data,
       const base::Closure& callback,
       const ErrorCallback& error_callback) = 0;
 
   // Clears the Out Of Band pairing data for this device.  Exactly one of
   // |callback| or |error_callback| will be run.
   virtual void ClearOutOfBandPairingData(
       const base::Closure& callback,
       const ErrorCallback& error_callback) = 0;
 
+  // Starts monitoring the connection properties, RSSI and TX power. These
+  // properties will be tracked, and updated when their values change. Exactly
+  // one of |callback| or |error_callback| will be run.
+  virtual void StartConnectionMonitor(const base::Closure& callback,
+                                      const ErrorCallback& error_callback) = 0;
+
+  // Stops monitoring the connection properties. Exactly one of |callback| or
+  // |error_callback| will be run.
+  virtual void StopConnectionMonitor(const base::Closure& callback,
+                                     const ErrorCallback& error_callback) = 0;
+

[keybuk, 2014/05/09 22:37:21]

NAK... we've been burned by these Start/Stop APIs before

Model your API on the Discovery Session API - have StartConnectionMonitor return
a scoped or ref-counted object that has a method on it to stop it again

[Tim Song, 2014/05/09 23:10:43]

Can I just have StartConnectionMonitor for now (no StopConnectionMonitor) and
make a session based approach with the actual API?

   // Returns the list of discovered GATT services.
   virtual std::vector<BluetoothGattService*> GetGattServices() const;
 
   // Returns the GATT service with device-specific identifier |identifier|.
   // Returns NULL, if no such service exists.
   virtual BluetoothGattService* GetGattService(
       const std::string& identifier) const;
 
  protected:
   BluetoothDevice();
 
   // Returns the internal name of the Bluetooth device, used by GetName().
   virtual std::string GetDeviceName() const = 0;
 
   // Mapping from the platform-specific GATT service identifiers to
   // BluetoothGattService objects.
   typedef std::map<std::string, BluetoothGattService*> GattServiceMap;
   GattServiceMap gatt_services_;
 
  private:
   // Returns a localized string containing the device's bluetooth address and
   // a device type for display when |name_| is empty.
   base::string16 GetAddressWithLocalizedDeviceTypeName() const;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_H_