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

media/base/video_capture_types.h

Index: media/base/video_capture_types.h
diff --git a/media/base/video_capture_types.h b/media/base/video_capture_types.h
index 4790ea52e1e12414226a882142495ed03c4b3eaa..d6ad5e3a736812f2d8f6ad8d0a275566402bcdaa 100644
--- a/media/base/video_capture_types.h
+++ b/media/base/video_capture_types.h
@@ -62,6 +62,7 @@ enum class PowerLineFrequency {
   FREQUENCY_60HZ = 60,
   FREQUENCY_MAX = FREQUENCY_60HZ
 };
+
 // Assert that the int:frequency mapping is correct.
 static_assert(static_cast<int>(PowerLineFrequency::FREQUENCY_DEFAULT) == 0,
               "static_cast<int>(FREQUENCY_DEFAULT) must equal 0.");