Update references to the extension messaging APIs to point to the "runtime"

chrome/common/extensions/api/bluetooth.idl

 // Copyright (c) 2012 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.
 
 // Bluetooth API.
 
 namespace bluetooth {
   dictionary AdapterState {
     // The address of the adapter, in the format 'XX:XX:XX:XX:XX:XX'.
     DOMString address;
@@ skipping 138 matching lines @@
     // device is cleared instead.
     OutOfBandPairingData? data;
   };
 
   // Options for the startDiscovery function.
   dictionary StartDiscoveryOptions {
     // Called for each device that is discovered.
     DeviceCallback deviceCallback;
   };
 
-  // These functions all report failures via chrome.extension.lastError.
+  // These functions all report failures via chrome.runtime.lastError.
   interface Functions {
     // Get information about the Bluetooth adapter.
     // |callback| : Called with an AdapterState object describing the adapter
     //              state.
     static void getAdapterState(AdapterStateCallback callback);
 
     // Get a bluetooth devices known to the system.  Known devices are either
     // currently bonded, or have been bonded in the past.
     // |options|  : Controls which devices are returned and provides
     //              |deviceCallback|, which is called for each matching device.
@@ skipping 59 matching lines @@
     static void stopDiscovery(
         optional ResultCallback callback);
   };
 
   interface Events {
     // Fired when the state of the Bluetooth adapter changes.
     // |state| : The new state of the adapter.
     static void onAdapterStateChanged(AdapterState state);
   };
 };