VideoCaptureDeviceFactory: Change device enumeration to callback + QTKit enumerates in UI thread.

media/video/capture/android/video_capture_device_factory_android.cc

 // 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/android/video_capture_device_factory_android.h"
 
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
@@ skipping 17 matching lines @@
     int id,
     jlong nativeVideoCaptureDeviceAndroid) {
   return (Java_VideoCaptureFactory_createVideoCapture(
       AttachCurrentThread(),
       base::android::GetApplicationContext(),
       id,
       nativeVideoCaptureDeviceAndroid));
 }
 
 scoped_ptr<VideoCaptureDevice> VideoCaptureDeviceFactoryAndroid::Create(
-    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
     const VideoCaptureDevice::Name& device_name) {
   DCHECK(thread_checker_.CalledOnValidThread());
   int id;
   if (!base::StringToInt(device_name.id(), &id))
     return scoped_ptr<VideoCaptureDevice>();
 
   VideoCaptureDeviceAndroid* video_capture_device(
       new VideoCaptureDeviceAndroid(device_name));
 
   if (video_capture_device->Init())
@@ skipping 73 matching lines @@
         pixel_format);
     capture_formats->push_back(capture_format);
     DVLOG(1) << device.name() << " resolution: "
         << capture_format.frame_size.ToString() << ", fps: "
         << capture_format.frame_rate << ", pixel format: "
         << capture_format.pixel_format;
   }
 }
 
 }  // namespace media