Clean up histogram'd media enum max values.

content/renderer/media/webrtc_audio_capturer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/webrtc_audio_capturer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
@@ skipping 134 matching lines @@
   if (render_view_id_ == -1) {
     // Return true here to allow injecting a new source via
     // SetCapturerSourceForTesting() at a later state.
     return true;
   }
 
   media::ChannelLayout channel_layout = static_cast<media::ChannelLayout>(
       device_info_.device.input.channel_layout);
   DVLOG(1) << "Audio input hardware channel layout: " << channel_layout;
   UMA_HISTOGRAM_ENUMERATION("WebRTC.AudioInputChannelLayout",
-                            channel_layout, media::CHANNEL_LAYOUT_MAX);
+                            channel_layout,
+                            media::CHANNEL_LAYOUT_HISTOGRAM_MAX);
 
   // Verify that the reported input channel configuration is supported.
   if (channel_layout != media::CHANNEL_LAYOUT_MONO &&
       channel_layout != media::CHANNEL_LAYOUT_STEREO) {
     DLOG(ERROR) << channel_layout
                 << " is not a supported input channel configuration.";
     return false;
   }
 
   DVLOG(1) << "Audio input hardware sample rate: "
@@ skipping 415 matching lines @@
     const scoped_refptr<media::AudioCapturerSource>& source,
     media::AudioParameters params) {
   // Create a new audio stream as source which uses the new source.
   SetCapturerSource(source, params.channel_layout(),
                     static_cast<float>(params.sample_rate()),
                     params.effects(),
                     constraints_);
 }
 
 }  // namespace content