Cleanup: Drop some unnecessary params from the BluetoothSocketNet constructor.

device/bluetooth/bluetooth_adapter_chromeos.cc

Index: device/bluetooth/bluetooth_adapter_chromeos.cc
diff --git a/device/bluetooth/bluetooth_adapter_chromeos.cc b/device/bluetooth/bluetooth_adapter_chromeos.cc
index 3f4a00ec94568f2a1eb47580100a02c7df06ca8d..bdfa4cee64cd24d10af42158cf66de5ce5f516e9 100644
--- a/device/bluetooth/bluetooth_adapter_chromeos.cc
+++ b/device/bluetooth/bluetooth_adapter_chromeos.cc
@@ -240,10 +240,7 @@ void BluetoothAdapterChromeOS::CreateRfcommService(
           << uuid.canonical_value();
   scoped_refptr<BluetoothSocketChromeOS> socket =
       BluetoothSocketChromeOS::CreateBluetoothSocket(
-          ui_task_runner_,
-          socket_thread_,
-          NULL,
-          net::NetLog::Source());
+          ui_task_runner_, socket_thread_);
   socket->Listen(this,
                  BluetoothSocketChromeOS::kRfcomm,
                  uuid,
@@ -261,10 +258,7 @@ void BluetoothAdapterChromeOS::CreateL2capService(
           << uuid.canonical_value();
   scoped_refptr<BluetoothSocketChromeOS> socket =
       BluetoothSocketChromeOS::CreateBluetoothSocket(
-          ui_task_runner_,
-          socket_thread_,
-          NULL,
-          net::NetLog::Source());
+          ui_task_runner_, socket_thread_);
   socket->Listen(this,
                  BluetoothSocketChromeOS::kL2cap,
                  uuid,