Bluetooth: mac: add connected BLE devices at startup

device/bluetooth/bluetooth_low_energy_device_mac.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/bluetooth/bluetooth_low_energy_device_mac.h"
 
 #import <CoreFoundation/CoreFoundation.h>
 #include <stddef.h>
 
 #include "base/mac/mac_util.h"
@@ skipping 15 matching lines @@
     CBPeripheral* peripheral)
     : BluetoothDeviceMac(adapter),
       peripheral_(peripheral, base::scoped_policy::RETAIN) {
   DCHECK(BluetoothAdapterMac::IsLowEnergyAvailable());
   DCHECK(peripheral_.get());
   peripheral_delegate_.reset([[BluetoothLowEnergyPeripheralDelegate alloc]
       initWithBluetoothLowEnergyDeviceMac:this]);
   [peripheral_ setDelegate:peripheral_delegate_];
   identifier_ = GetPeripheralIdentifier(peripheral);
   hash_address_ = GetPeripheralHashAddress(peripheral);
+
+  // TODO(jracle): Following line is a patch to avoid being considered
+  // as a timed-out device in BluetoothAdapter::RemoveTimedOutDevices().
+  // Consider removing it and review BluetoothAdapter's logic.
+  UpdateTimestamp();

[jracle (use Gerrit), 2016/09/02 14:23:10]

I did this hack here, but I think we could instead try not removing BLE devices
in adapter if possible.
Maybe we could filter-out only classic devices and update
BluetoothAdapter::RemoveTimedOutDevices() instead.

 }
 
 BluetoothLowEnergyDeviceMac::~BluetoothLowEnergyDeviceMac() {
   if (IsGattConnected()) {
     GetMacAdapter()->DisconnectGatt(this);
   }
 }
 
 std::string BluetoothLowEnergyDeviceMac::GetIdentifier() const {
   return identifier_;
@@ skipping 311 matching lines @@
   //   2. When we cancel a pending connection request.
   if (create_gatt_connection_error_callbacks_.empty()) {
     // If there are no pending callbacks then the connection broke (#1).
     DidDisconnectGatt();
     return;
   }
   // Else we canceled the connection request (#2).
   // TODO(http://crbug.com/585897): Need to pass the error.
   DidFailToConnectGatt(BluetoothDevice::ConnectErrorCode::ERROR_FAILED);
 }