Clear the BLE services list on disconnect.

device/bluetooth/bluetooth_device.h

Index: device/bluetooth/bluetooth_device.h
diff --git a/device/bluetooth/bluetooth_device.h b/device/bluetooth/bluetooth_device.h
index a28bc9e244b9a2d54a308fceca4135147b1d251c..aa5a1534b6d68db8a3d624d829f8269e47db6bdc 100644
--- a/device/bluetooth/bluetooth_device.h
+++ b/device/bluetooth/bluetooth_device.h
@@ -424,6 +424,12 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDevice {
   virtual void CreateGattConnection(const GattConnectionCallback& callback,
                                     const ConnectErrorCallback& error_callback);
 
+  // Set the gatt services discovery complete flag for this device.

[ortuno, 2016/01/13 18:22:02]

nit: comment should be descriptive rather than imperative[1]

[1] https://google.github.io/styleguide/cppguide.html#Function_Comments

+  void SetGattServicesDiscoveryComplete(bool complete);
+
+  // Indicates whether service discovery is complete for this device.
+  bool IsGattServicesDiscoveryComplete() const;
+
   // Returns the list of discovered GATT services.
   virtual std::vector<BluetoothGattService*> GetGattServices() const;
 
@@ -454,6 +460,8 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDevice {
       BluetoothGattConnection_DisconnectGatt_SimulateDisconnect);
   FRIEND_TEST_ALL_PREFIXES(BluetoothTest,
                            BluetoothGattConnection_ErrorAfterConnection);
+  FRIEND_TEST_ALL_PREFIXES(BluetoothTest,
+                           BluetoothGattConnection_DisconnectGatt_Cleanup);
 
   BluetoothDevice(BluetoothAdapter* adapter);
 
@@ -511,6 +519,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDevice {
   typedef base::ScopedPtrHashMap<std::string, scoped_ptr<BluetoothGattService>>
       GattServiceMap;
   GattServiceMap gatt_services_;
+  bool gatt_services_discovery_complete_;
 
   // Mapping from service UUID represented as a std::string of a bluetooth
   // service to