Migrate content/ files to histogram_macros.h includes.

content/renderer/media/track_audio_renderer.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/track_audio_renderer.h"
 
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "content/renderer/media/audio_device_factory.h"
 #include "content/renderer/media/media_stream_audio_track.h"
 #include "media/base/audio_bus.h"
 #include "media/base/audio_latency.h"
 #include "media/base/audio_shifter.h"
 
 namespace content {
@@ skipping 366 matching lines @@
   if (source_params_.IsValid()) {
     prior_elapsed_render_time_ =
         ComputeTotalElapsedRenderTime(prior_elapsed_render_time_,
                                       num_samples_rendered_,
                                       source_params_.sample_rate());
     num_samples_rendered_ = 0;
   }
 }
 
 }  // namespace content