Delete browser MSE implementation.

media/base/android/media_statistics.cc

Index: media/base/android/media_statistics.cc
diff --git a/media/base/android/media_statistics.cc b/media/base/android/media_statistics.cc
deleted file mode 100644
index e141bbbc5839564c462a555b7cbe7bf4e79956a4..0000000000000000000000000000000000000000
--- a/media/base/android/media_statistics.cc
+++ /dev/null
@@ -1,125 +0,0 @@
-// Copyright 2015 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/base/android/media_statistics.h"
-
-#include "base/logging.h"
-#include "base/metrics/histogram_macros.h"
-#include "media/base/android/demuxer_stream_player_params.h"
-
-namespace media {
-
-// Minimum playback interval to report.
-const int kMinDurationInSeconds = 2;
-
-// Maximum playback interval to report.
-const int kMaxDurationInSeconds = 3600;
-
-// Number of slots in the histogram for playback interval.
-const int kNumDurationSlots = 50;
-
-// For easier reading.
-const int kOneMillion = 1000000;
-
-void FrameStatistics::IncrementLateFrameCount() {
-  // Do not collect the late frame if this is the first frame after the start.
-  // Right now we do not want to consider the late video frame which is the
-  // first after preroll, preroll may be inacurate in this respect.
-  // The first audio frame cannot be late by definition and by not considering
-  // it we can simplify audio decoder code.
-  if (total == 1)
-    return;
-
-  ++late;
-}
-
-MediaStatistics::MediaStatistics() {}
-
-MediaStatistics::~MediaStatistics() {}
-
-void MediaStatistics::Start(base::TimeDelta current_playback_time) {
-  DVLOG(1) << __FUNCTION__;
-
-  if (start_time_ == kNoTimestamp) {
-    Clear();
-    start_time_ = current_playback_time;
-  }
-}
-
-void MediaStatistics::StopAndReport(base::TimeDelta current_playback_time) {
-  DVLOG(1) << __FUNCTION__;
-
-  if (start_time_ == kNoTimestamp)
-    return;  // skip if there was no prior Start().
-
-  if (current_playback_time == kNoTimestamp) {
-    // Cancel the start event and skip if current time is unknown.
-    start_time_ = kNoTimestamp;
-    return;
-  }
-
-  base::TimeDelta duration = current_playback_time - start_time_;
-
-  // Reset start time.
-  start_time_ = kNoTimestamp;
-
-  if (duration < base::TimeDelta::FromSeconds(kMinDurationInSeconds))
-    return;  // duration is too short.
-
-  if (duration > base::TimeDelta::FromSeconds(kMaxDurationInSeconds))
-    return;  // duration is too long.
-
-  Report(duration);
-}
-
-void MediaStatistics::Clear() {
-  start_time_ = kNoTimestamp;
-  audio_frame_stats_.Clear();
-  video_frame_stats_.Clear();
-  num_starvations_ = 0;
-}
-
-void MediaStatistics::Report(base::TimeDelta duration) {
-  DVLOG(1) << __FUNCTION__ << " duration:" << duration
-           << " audio frames:"
-           << audio_frame_stats_.late << "/" << audio_frame_stats_.total
-           << " video frames:"
-           << video_frame_stats_.late << "/" << video_frame_stats_.total
-           << " starvations:" << num_starvations_;
-
-  // Playback duration is the time interval between the moment playback starts
-  // and the moment it is interrupted either by stopping or by seeking, changing
-  // to full screen, minimizing the browser etc. The interval is measured by
-  // media time.
-
-  UMA_HISTOGRAM_CUSTOM_TIMES(
-      "Media.MSE.PlaybackDuration", duration,

[wolenetz, 2016/09/30 23:23:23]

Deprecate this in histograms.xml?

[DaleCurtis, 2016/09/30 23:34:24]

Done.

-      base::TimeDelta::FromSeconds(kMinDurationInSeconds),
-      base::TimeDelta::FromSeconds(kMaxDurationInSeconds), kNumDurationSlots);
-
-  // Number of late frames per one million frames.
-
-  if (audio_frame_stats_.total) {
-    UMA_HISTOGRAM_COUNTS(
-        "Media.MSE.LateAudioFrames",

[wolenetz, 2016/09/30 23:23:23]

ditto

[DaleCurtis, 2016/09/30 23:34:24]

Done.

-        kOneMillion * audio_frame_stats_.late / audio_frame_stats_.total);
-  }
-
-  if (video_frame_stats_.total) {
-    UMA_HISTOGRAM_COUNTS(
-        "Media.MSE.LateVideoFrames",

[wolenetz, 2016/09/30 23:23:23]

ditto

[DaleCurtis, 2016/09/30 23:34:24]

Done.

-        kOneMillion * video_frame_stats_.late / video_frame_stats_.total);
-  }
-
-  // Number of starvations per one million frames.
-
-  uint32_t total_frames = audio_frame_stats_.total ? audio_frame_stats_.total
-                                                   : video_frame_stats_.total;
-  if (total_frames) {
-    UMA_HISTOGRAM_COUNTS("Media.MSE.Starvations",

[wolenetz, 2016/09/30 23:23:23]

ditto

[DaleCurtis, 2016/09/30 23:34:24]

Done.

-                         kOneMillion * num_starvations_ / total_frames);
-  }
-}
-
-}  // namespace media