Clean up histogram'd media enum max values.

media/base/video_decoder_config.cc

Index: media/base/video_decoder_config.cc
diff --git a/media/base/video_decoder_config.cc b/media/base/video_decoder_config.cc
index 82d607526bb48c17914e36d7a01e1fb16c462566..60b1d007ce39725e4621fa3c9eb96fd5b89e0f54 100644
--- a/media/base/video_decoder_config.cc
+++ b/media/base/video_decoder_config.cc
@@ -66,11 +66,12 @@ void VideoDecoderConfig::Initialize(VideoCodec codec,
   CHECK((extra_data_size != 0) == (extra_data != NULL));
 
   if (record_stats) {
-    UMA_HISTOGRAM_ENUMERATION("Media.VideoCodec", codec, kVideoCodecMax + 1);
+    UMA_HISTOGRAM_ENUMERATION(
+        "Media.VideoCodec", codec, kVideoCodecHistogramMax);
     // Drop UNKNOWN because U_H_E() uses one bucket for all values less than 1.
     if (profile >= 0) {
       UMA_HISTOGRAM_ENUMERATION("Media.VideoCodecProfile", profile,
-                                VIDEO_CODEC_PROFILE_MAX + 1);
+                                VIDEO_CODEC_PROFILE_HISTOGRAM_MAX);
     }
     UMA_HISTOGRAM_COUNTS_10000("Media.VideoCodedWidth", coded_size.width());
     UmaHistogramAspectRatio("Media.VideoCodedAspectRatio", coded_size);