bluetooth: macOS: Support for extra didConnectPeripheral event from macOS.

device/bluetooth/bluetooth_low_energy_device_mac.mm

Index: device/bluetooth/bluetooth_low_energy_device_mac.mm
diff --git a/device/bluetooth/bluetooth_low_energy_device_mac.mm b/device/bluetooth/bluetooth_low_energy_device_mac.mm
index 20694e4953b97d7ca5d4edc882a0a4b0aab06864..fb0e4f42af40d7d44398296ca4d41120c13b2569 100644
--- a/device/bluetooth/bluetooth_low_energy_device_mac.mm
+++ b/device/bluetooth/bluetooth_low_energy_device_mac.mm
@@ -28,6 +28,7 @@ BluetoothLowEnergyDeviceMac::BluetoothLowEnergyDeviceMac(
     CBPeripheral* peripheral)
     : BluetoothDeviceMac(adapter),
       peripheral_(peripheral, base::scoped_policy::RETAIN),
+      connected_(false),
       discovery_pending_count_(0) {
   DCHECK(BluetoothAdapterMac::IsLowEnergyAvailable());
   DCHECK(peripheral_.get());
@@ -96,7 +97,11 @@ bool BluetoothLowEnergyDeviceMac::IsConnected() const {
 }
 
 bool BluetoothLowEnergyDeviceMac::IsGattConnected() const {
-  return ([peripheral_ state] == CBPeripheralStateConnected);
+  // |connected_| can be false while |[peripheral_ state]| is
+  // |CBPeripheralStateConnected|. This happens
+  // BluetoothAdapterMac::DidConnectPeripheral() is called and
+  // BluetoothLowEnergyDeviceMac::DidConnectGatt() has not been called yet.
+  return connected_;
 }
 
 bool BluetoothLowEnergyDeviceMac::IsConnectable() const {
@@ -186,6 +191,18 @@ void BluetoothLowEnergyDeviceMac::DisconnectGatt() {
   GetMacAdapter()->DisconnectGatt(this);
 }
 
+void BluetoothLowEnergyDeviceMac::DidConnectGatt() {
+  VLOG(1) << *this << ": Gatt connected.";
+  bool should_discover_services = !connected_;
+  connected_ = true;
+  BluetoothDeviceMac::DidConnectGatt();
+  if (should_discover_services) {
+    DiscoverPrimaryServices();
+  } else {
+    VLOG(1) << *this << ": Already connected, no need to discover services.";
+  }
+}
+
 void BluetoothLowEnergyDeviceMac::DidDiscoverPrimaryServices(NSError* error) {
   --discovery_pending_count_;
   if (discovery_pending_count_ < 0) {
@@ -435,6 +452,7 @@ BluetoothLowEnergyDeviceMac::GetBluetoothRemoteGattDescriptor(
 }
 
 void BluetoothLowEnergyDeviceMac::DidDisconnectPeripheral(NSError* error) {
+  connected_ = false;
   VLOG(1) << *this << ": Disconnected from peripheral.";
   if (error) {
     VLOG(1) << *this
@@ -468,8 +486,10 @@ std::ostream& operator<<(std::ostream& out,
   // TODO(crbug.com/703878): Should use
   // BluetoothLowEnergyDeviceMac::GetNameForDisplay() instead.
   base::Optional<std::string> name = device.GetName();
-  const char* name_cstr = name ? name->c_str() : "";
+  const char* is_gatt_connected =
+      device.IsGattConnected() ? "GATT connected" : "GATT disconnected";
   return out << "<BluetoothLowEnergyDeviceMac " << device.GetAddress() << "/"
-             << &device << ", \"" << name_cstr << "\">";
+             << &device << ", " << is_gatt_connected << ", \""
+             << name.value_or("Unnamed device") << "\">";
 }
 }  // namespace device