Delayed adding BluetoothEventRouter as BluetoothAdapter observer until when the

chrome/browser/extensions/api/bluetooth/bluetooth_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/bluetooth/bluetooth_api.h"
 
 #if defined(OS_CHROMEOS)
 #include <errno.h>
 #endif
 
@@ skipping 556 matching lines @@
 
 bool BluetoothStartDiscoveryFunction::RunImpl() {
   if (!IsBluetoothSupported(profile())) {
     SetError(kPlatformNotSupported);
     return false;
   }
 
   GetEventRouter(profile())->SetSendDiscoveryEvents(true);
 
   // If the adapter is already discovering, there is nothing else to do.
-  if (GetMutableAdapter(profile())->IsDiscovering()) {
+  if (GetAdapter(profile())->IsDiscovering()) {
     SendResponse(true);
     return true;
   }
 
   GetMutableAdapter(profile())->SetDiscovering(true,
       base::Bind(&BluetoothStartDiscoveryFunction::OnSuccessCallback, this),
       base::Bind(&BluetoothStartDiscoveryFunction::OnErrorCallback, this));
   return true;
 }
 
@@ skipping 16 matching lines @@
   if (GetEventRouter(profile())->IsResponsibleForDiscovery()) {
     GetMutableAdapter(profile())->SetDiscovering(false,
         base::Bind(&BluetoothStopDiscoveryFunction::OnSuccessCallback, this),
         base::Bind(&BluetoothStopDiscoveryFunction::OnErrorCallback, this));
   }
   return true;
 }
 
 }  // namespace api
 }  // namespace extensions