bluetooth: mac: add connected LE devices to chooser

device/bluetooth/test/mock_bluetooth_central_manager_mac.h

Index: device/bluetooth/test/mock_bluetooth_central_manager_mac.h
diff --git a/device/bluetooth/test/mock_bluetooth_central_manager_mac.h b/device/bluetooth/test/mock_bluetooth_central_manager_mac.h
index 5bc02457f53be705fc48a2b785178cdce2f844e6..aee59e3953fb75090cb9e8136fb6b0723d06456b 100644
--- a/device/bluetooth/test/mock_bluetooth_central_manager_mac.h
+++ b/device/bluetooth/test/mock_bluetooth_central_manager_mac.h
@@ -23,6 +23,7 @@
 @property(nonatomic, assign) id<CBCentralManagerDelegate> delegate;
 @property(nonatomic, assign) CBCentralManagerState state;
 @property(nonatomic, assign) device::BluetoothTestMac* bluetoothTestMac;
+@property(nonatomic, readonly) NSArray* retrieveConnectedPeripheralServiceUUIDs;
 
 - (void)scanForPeripheralsWithServices:(NSArray*)serviceUUIDs
                                options:(NSDictionary*)options;
@@ -32,6 +33,15 @@
 - (void)connectPeripheral:(CBPeripheral*)peripheral
                   options:(NSDictionary*)options;
 
+// Simulates a peripheral being used by another application. This peripheral
+// will be returned by -[MockCentralManager
+// retrieveConnectedPeripheralsWithServices:].
+- (void)setConnectedMockPeripheral:(CBPeripheral*)peripheral
+                  withServiceUUIDs:(NSSet*)serviceUUIDs;
+
+// Reset -[MockCentralManager retrieveConnectedPeripheralServiceUUIDs].
+- (void)resetRetrieveConnectedPeripheralServiceUUIDs;
+
 @end
 
 #endif  // DEVICE_BLUETOOTH_MOCK_BLUETOOTH_CENTRAL_MANAGER_MAC_H_