Add watch time metrics for HTML5 media playback.

media/base/media_log.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/base/media_log.h"
 
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
 #include "base/json/json_writer.h"
 #include "base/values.h"
 
 namespace media {
 
 // A count of all MediaLogs created in the current process. Used to generate
 // unique IDs.
 static base::StaticAtomicSequenceNumber g_media_log_count;
 
+const char MediaLog::kWatchTimeAudioVideoAll[] =
+    "Media.WatchTime.AudioVideo.All";
+const char MediaLog::kWatchTimeAudioVideoMse[] =
+    "Media.WatchTime.AudioVideo.MSE";
+const char MediaLog::kWatchTimeAudioVideoEme[] =
+    "Media.WatchTime.AudioVideo.EME";
+const char MediaLog::kWatchTimeAudioVideoSrc[] =
+    "Media.WatchTime.AudioVideo.SRC";
+const char MediaLog::kWatchTimeAudioVideoBattery[] =
+    "Media.WatchTime.AudioVideo.Battery";
+const char MediaLog::kWatchTimeAudioVideoAc[] = "Media.WatchTime.AudioVideo.AC";
+
+const char MediaLog::kWatchTimeFinalize[] = "FinalizeWatchTime";
+const char MediaLog::kWatchTimeFinalizePower[] = "FinalizePowerWatchTime";
+
 std::string MediaLog::MediaLogLevelToString(MediaLogLevel level) {
   switch (level) {
     case MEDIALOG_ERROR:
       return "error";
     case MEDIALOG_INFO:
       return "info";
     case MEDIALOG_DEBUG:
       return "debug";
   }
   NOTREACHED();
@@ skipping 46 matching lines @@
     case MediaLogEvent::BUFFERED_EXTENTS_CHANGED:
       return "BUFFERED_EXTENTS_CHANGED";
     case MediaLogEvent::MEDIA_ERROR_LOG_ENTRY:
       return "MEDIA_ERROR_LOG_ENTRY";
     case MediaLogEvent::MEDIA_INFO_LOG_ENTRY:
       return "MEDIA_INFO_LOG_ENTRY";
     case MediaLogEvent::MEDIA_DEBUG_LOG_ENTRY:
       return "MEDIA_DEBUG_LOG_ENTRY";
     case MediaLogEvent::PROPERTY_CHANGE:
       return "PROPERTY_CHANGE";
+    case MediaLogEvent::WATCH_TIME_UPDATE:
+      return "WATCH_TIME_UPDATE";
   }
   NOTREACHED();
   return NULL;
 }
 
 std::string MediaLog::PipelineStatusToString(PipelineStatus status) {
   switch (status) {
     case PIPELINE_OK:
       return "pipeline: ok";
     case PIPELINE_ERROR_NETWORK:
@@ skipping 192 matching lines @@
                      const scoped_refptr<MediaLog>& media_log)
     : level_(level), media_log_(media_log) {
   DCHECK(media_log_.get());
 }
 
 LogHelper::~LogHelper() {
   media_log_->AddLogEvent(level_, stream_.str());
 }
 
 }  //namespace media