Remove implicit conversions from scoped_refptr to T* in media/

media/video/capture/mac/video_capture_device_factory_mac.mm

 // 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.
 
 #include "media/video/capture/mac/video_capture_device_factory_mac.h"
 
 #import <IOKit/audio/IOAudioTypes.h>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 155 matching lines @@
 void VideoCaptureDeviceFactoryMac::EnumerateDeviceNames(const base::Callback<
     void(scoped_ptr<media::VideoCaptureDevice::Names>)>& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (AVFoundationGlue::IsAVFoundationSupported()) {
     scoped_ptr<VideoCaptureDevice::Names> device_names(
         new VideoCaptureDevice::Names());
     GetDeviceNames(device_names.get());
     callback.Run(device_names.Pass());
   } else {
     DVLOG(1) << "Enumerating video capture devices using QTKit";
-    base::PostTaskAndReplyWithResult(ui_task_runner_, FROM_HERE,
+    base::PostTaskAndReplyWithResult(
+        ui_task_runner_.get(),
+        FROM_HERE,
         base::Bind(&EnumerateDevicesUsingQTKit),
         base::Bind(&RunDevicesEnumeratedCallback, callback));
   }
 }
 
 void VideoCaptureDeviceFactoryMac::GetDeviceSupportedFormats(
     const VideoCaptureDevice::Name& device,
     VideoCaptureFormats* supported_formats) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (device.capture_api_type() == VideoCaptureDevice::Name::AVFOUNDATION) {
@@ skipping 13 matching lines @@
               kBlacklistedCameras[i].capture_frame_rate,
               media::PIXEL_FORMAT_UYVY));
           break;
         }
       }
     }
   }
 }
 
 }  // namespace media