Implementing GATT connection/disconnect on OS X.

device/bluetooth/bluetooth_adapter_mac.mm

Index: device/bluetooth/bluetooth_adapter_mac.mm
diff --git a/device/bluetooth/bluetooth_adapter_mac.mm b/device/bluetooth/bluetooth_adapter_mac.mm
index 1d51e702226fe5ba1ea92833b8c2b1b6705e746d..a4680b0a57f84669559a556a4fbc330e3436bf0e 100644
--- a/device/bluetooth/bluetooth_adapter_mac.mm
+++ b/device/bluetooth/bluetooth_adapter_mac.mm
@@ -536,4 +536,31 @@ void BluetoothAdapterMac::AddPairedDevices() {
   }
 }
 
+void BluetoothAdapterMac::CreateGattConnection(
+    BluetoothLowEnergyDeviceMac* deviceMac) {
+  [low_energy_central_manager_ connectPeripheral:deviceMac->peripheral_
+                                         options:nil];
+}
+
+void BluetoothAdapterMac::DidConnectPeripheral(CBPeripheral* peripheral) {
+  std::string device_address =
+      BluetoothLowEnergyDeviceMac::GetPeripheralHashAddress(peripheral);
+  // Try to find device from |devices_| with key |device_address|,
+  // if has no entry in the map, disconnect the peripheral.
+  DevicesMap::const_iterator iter = devices_.find(device_address);
+  if (iter == devices_.end()) {
+    [low_energy_central_manager_ cancelPeripheralConnection:peripheral];
+    return;
+  }
+  BluetoothLowEnergyDeviceMac* device_mac =
+  static_cast<BluetoothLowEnergyDeviceMac*>(iter->second);
+  device_mac->GattConnected();
+}
+
+void BluetoothAdapterMac::DisconnectGatt(
+    BluetoothLowEnergyDeviceMac* deviceMac) {
+  [low_energy_central_manager_
+      cancelPeripheralConnection:deviceMac->peripheral_];
+}
+
 }  // namespace device