File VideoCaptureDevice: Add API type for Windows platforms.

It was missing and causes troubles in browser_tests as seen
in the bug.

BUG=422954

Review URL: https://codereview.chromium.org/650903002

Cr-Commit-Position: refs/heads/master@{#299451}

media/video/capture/file_video_capture_device_factory.cc

@@ -44,7 +44,8 @@ void FileVideoCaptureDeviceFactory::GetDeviceNames(
 #if defined(OS_WIN)
   device_names->push_back(VideoCaptureDevice::Name(
       base::SysWideToUTF8(command_line_file_path.value()),
-      kFileVideoCaptureDeviceName));
+      kFileVideoCaptureDeviceName,
+      VideoCaptureDevice::Name::DIRECT_SHOW));
 #elif defined(OS_MACOSX)
   device_names->push_back(VideoCaptureDevice::Name(
       command_line_file_path.value(),