bluetooth: Replace old advertised uuids

device/bluetooth/bluetooth_low_energy_discovery_manager_mac.mm

Index: device/bluetooth/bluetooth_low_energy_discovery_manager_mac.mm
diff --git a/device/bluetooth/bluetooth_low_energy_discovery_manager_mac.mm b/device/bluetooth/bluetooth_low_energy_discovery_manager_mac.mm
index 77dafb03c8d62ac8ccb545054ed18f306e1442e3..1743523d1b4ccc07034073647fbc9aa2b94eda78 100644
--- a/device/bluetooth/bluetooth_low_energy_discovery_manager_mac.mm
+++ b/device/bluetooth/bluetooth_low_energy_discovery_manager_mac.mm
@@ -64,7 +64,14 @@ void BluetoothLowEnergyDiscoveryManagerMac::TryStartDiscovery() {
   };
 
   VLOG(1) << "TryStartDiscovery scanForPeripheralsWithServices";
-  [central_manager_ scanForPeripheralsWithServices:services options:nil];
+  // Start a scan with the Allow Duplicates option so that we get notified
+  // of each new advertisement packet.

[scheib, 2016/08/06 00:21:41]

Good, but follow through with why we need to see each packet. (cite the comment
you'll at too Observer::DeviceChanged)

[ortuno, 2016/08/08 22:56:39]

Done.

+  [central_manager_
+      scanForPeripheralsWithServices:services
+                             options:@{
+                               CBCentralManagerScanOptionAllowDuplicatesKey :
+                                   @YES
+                             }];
   pending_ = false;
 }