Change the functions in video_capture_device to pass around PowerLineFrequency enums instead of int…

media/capture/video/win/video_capture_device_win.cc

Index: media/capture/video/win/video_capture_device_win.cc
diff --git a/media/capture/video/win/video_capture_device_win.cc b/media/capture/video/win/video_capture_device_win.cc
index 055fc2105f1e51c7af9e847da6da6f97bfc060ca..9960406ea1d61238be2abe6b88fd5096135c143b 100644
--- a/media/capture/video/win/video_capture_device_win.cc
+++ b/media/capture/video/win/video_capture_device_win.cc
@@ -539,11 +539,9 @@ bool VideoCaptureDeviceWin::CreateCapabilityMap() {
 // Set the power line frequency removal in |capture_filter_| if available.
 void VideoCaptureDeviceWin::SetAntiFlickerInCaptureFilter(
     const VideoCaptureParams& params) {
-  const int power_line_frequency = GetPowerLineFrequency(params);
-  if (power_line_frequency !=
-          static_cast<int>(media::PowerLineFrequency::FREQUENCY_50HZ) &&
-      power_line_frequency !=
-          static_cast<int>(media::PowerLineFrequency::FREQUENCY_60HZ)) {
+  const PowerLineFrequency power_line_frequency = GetPowerLineFrequency(params);
+  if (power_line_frequency != media::PowerLineFrequency::FREQUENCY_50HZ &&
+      power_line_frequency != media::PowerLineFrequency::FREQUENCY_60HZ) {
     return;
   }
   ScopedComPtr<IKsPropertySet> ks_propset;
@@ -559,10 +557,9 @@ void VideoCaptureDeviceWin::SetAntiFlickerInCaptureFilter(
     data.Property.Set = PROPSETID_VIDCAP_VIDEOPROCAMP;
     data.Property.Id = KSPROPERTY_VIDEOPROCAMP_POWERLINE_FREQUENCY;
     data.Property.Flags = KSPROPERTY_TYPE_SET;
-    data.Value = (power_line_frequency ==
-                  static_cast<int>(media::PowerLineFrequency::FREQUENCY_50HZ))
-                     ? 1
-                     : 2;
+    data.Value =
+        (power_line_frequency == media::PowerLineFrequency::FREQUENCY_50HZ) ? 1
+                                                                            : 2;
     data.Flags = KSPROPERTY_VIDEOPROCAMP_FLAGS_MANUAL;
     hr = ks_propset->Set(PROPSETID_VIDCAP_VIDEOPROCAMP,
                          KSPROPERTY_VIDEOPROCAMP_POWERLINE_FREQUENCY, &data,