Clean up histogram'd media enum max values.

media/filters/audio_renderer_impl.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 "media/filters/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
 #include "media/base/audio_buffer.h"
 #include "media/base/audio_splicer.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/demuxer_stream.h"
 #include "media/filters/decrypting_demuxer_stream.h"
 
 namespace media {
 
 namespace {
 
 enum AudioRendererEvent {
   INITIALIZED,
   RENDER_ERROR,
-  MAX_EVENTS
+  RENDER_EVENT_MAX = RENDER_ERROR,
 };
 
 void HistogramRendererEvent(AudioRendererEvent event) {
-  UMA_HISTOGRAM_ENUMERATION("Media.AudioRendererEvents", event, MAX_EVENTS);
+  UMA_HISTOGRAM_ENUMERATION(
+      "Media.AudioRendererEvents", event, RENDER_EVENT_MAX + 1);
 }
 
 }  // namespace
 
 AudioRendererImpl::AudioRendererImpl(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     media::AudioRendererSink* sink,
     ScopedVector<AudioDecoder> decoders,
     const SetDecryptorReadyCB& set_decryptor_ready_cb)
     : task_runner_(task_runner),
@@ skipping 696 matching lines @@
   }
 }
 
 void AudioRendererImpl::ChangeState_Locked(State new_state) {
   DVLOG(1) << __FUNCTION__ << " : " << state_ << " -> " << new_state;
   lock_.AssertAcquired();
   state_ = new_state;
 }
 
 }  // namespace media