[Bluetooth] Standardize Bluetooth device address format to XX:XX:XX:XX:XX:XX.

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 400 matching lines @@
                                       const ErrorCallback& error_callback) = 0;
 
   // 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;
 
+  // Returns the |address| in the canoncial format: XX:XX:XX:XX:XX:XX, where
+  // each 'X' is a hex digit.  If the input |address| is invalid, returns an
+  // empty string.
+  static std::string CanonicalizeAddress(const std::string& address);
+
  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_