File video capture device supports MJPEG format

media/capture/video/file_video_capture_device_factory.cc

Index: media/capture/video/file_video_capture_device_factory.cc
diff --git a/media/capture/video/file_video_capture_device_factory.cc b/media/capture/video/file_video_capture_device_factory.cc
index 1d7ae1264300dae28b89711e4b52f6ffcc25f3cd..12ca232bf52a6b670034fe68bf9fae72e8f58739 100644
--- a/media/capture/video/file_video_capture_device_factory.cc
+++ b/media/capture/video/file_video_capture_device_factory.cc
@@ -63,13 +63,16 @@ void FileVideoCaptureDeviceFactory::GetDeviceSupportedFormats(
     const VideoCaptureDevice::Name& device,
     VideoCaptureFormats* supported_formats) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  base::File file =
+  scoped_ptr<base::MemoryMappedFile> mapped_file =
       FileVideoCaptureDevice::OpenFileForRead(GetFilePathFromCommandLine());
-  if (!file.IsValid())
+  if (!mapped_file || !mapped_file->IsValid())
     return;
   VideoCaptureFormat capture_format;
-  FileVideoCaptureDevice::ParseFileAndExtractVideoFormat(&file,
-                                                         &capture_format);
+  int frame_size;
+  if (FileVideoCaptureDevice::ParseFileAndExtractVideoFormat(
+        mapped_file.get(), &capture_format, &frame_size) < 0) {
+    return;
+  }
   supported_formats->push_back(capture_format);
 }