bluetooth: mac: add connected LE devices to chooser

device/bluetooth/test/mock_bluetooth_central_manager_mac.mm

Index: device/bluetooth/test/mock_bluetooth_central_manager_mac.mm
diff --git a/device/bluetooth/test/mock_bluetooth_central_manager_mac.mm b/device/bluetooth/test/mock_bluetooth_central_manager_mac.mm
index fbb0dff41e75d315a5044a6e61dde508fe7382fd..12b4005406b5a5813b389a8cfbf6a2881f83f657 100644
--- a/device/bluetooth/test/mock_bluetooth_central_manager_mac.mm
+++ b/device/bluetooth/test/mock_bluetooth_central_manager_mac.mm
@@ -4,10 +4,15 @@
 
 #import "device/bluetooth/test/mock_bluetooth_central_manager_mac.h"
 
+#import "base/mac/scoped_nsobject.h"
 #import "device/bluetooth/test/bluetooth_test_mac.h"
 #import "device/bluetooth/test/mock_bluetooth_cbperipheral_mac.h"
 
-@implementation MockCentralManager
+using base::scoped_nsobject;
+
+@implementation MockCentralManager {
+  scoped_nsobject<NSArray> _connectedMockPeripheral;
+}
 
 @synthesize scanForPeripheralsCallCount = _scanForPeripheralsCallCount;
 @synthesize stopScanCallCount = _stopScanCallCount;
@@ -15,6 +20,19 @@
 @synthesize state = _state;
 @synthesize bluetoothTestMac = _bluetoothTestMac;
 
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _connectedMockPeripheral.reset([[NSArray alloc] init]);
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [_connectedMockPeripheral release];
+  [super dealloc];
+}
+
 - (BOOL)isKindOfClass:(Class)aClass {
   if (aClass == [CBCentralManager class] ||
       [aClass isSubclassOfClass:[CBCentralManager class]]) {
@@ -53,4 +71,12 @@
   }
 }
 
+- (NSArray*)retrieveConnectedPeripheralsWithServices:(NSArray*)services {
+  return _connectedMockPeripheral.get();
+}
+
+- (void)setConnectedMockPeripherals:(NSArray*)peripherals {
+  _connectedMockPeripheral.reset([peripherals copy]);
+}
+
 @end