Fix typos in device/bluetooth headers.

device/bluetooth/bluetooth_pairing_chromeos.h

 // Copyright 2014 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_PAIRING_CHROMEOS_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_PAIRING_CHROMEOS_H_
 
 #include "chromeos/dbus/bluetooth_agent_service_provider.h"
 #include "device/bluetooth/bluetooth_device.h"
 
@@ skipping 91 matching lines @@
 
   // Cancels a pairing or connection attempt to a remote device, returns
   // false if there was no way to cancel the pairing.
   bool CancelPairing();
 
   // Returns the pairing delegate being used by this pairing object.
   device::BluetoothDevice::PairingDelegate* GetPairingDelegate() const;
 
  private:
   // Internal method to reset the current set of callbacks because a new
-  // request has arrived that supercedes them.
+  // request has arrived that supersedes them.
   void ResetCallbacks();
 
   // Internal method to respond to the relevant callback for a RejectPairing
   // or CancelPairing call.
   bool RunPairingCallbacks(
       BluetoothAgentServiceProvider::Delegate::Status status);
 
   // The underlying BluetoothDeviceChromeOS that owns this pairing context.
   BluetoothDeviceChromeOS* device_;
 
@@ skipping 14 matching lines @@
   BluetoothAgentServiceProvider::Delegate::PasskeyCallback passkey_callback_;
   BluetoothAgentServiceProvider::Delegate::ConfirmationCallback
       confirmation_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothPairingChromeOS);
 };
 
 }  // namespace chromeos
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_PAIRING_CHROMEOS_H_