Start recording background video watch time.

media/base/media_log.h

 // 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.
 
 #ifndef MEDIA_BASE_MEDIA_LOG_H_
 #define MEDIA_BASE_MEDIA_LOG_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <sstream>
 #include <string>
 
+#include "base/containers/flat_set.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/buffering_state.h"
 #include "media/base/media_export.h"
 #include "media/base/media_log_event.h"
 #include "media/base/pipeline_impl.h"
 #include "media/base/pipeline_status.h"
 
 namespace media {
@@ skipping 58 matching lines @@
 
   // Report a log message at the specified log level.
   void AddLogEvent(MediaLogLevel level, const std::string& message);
 
   // Report a property change without an accompanying event.
   void SetStringProperty(const std::string& key, const std::string& value);
   void SetDoubleProperty(const std::string& key, double value);
   void SetBooleanProperty(const std::string& key, bool value);
 
   // Histogram names used for reporting; also double as MediaLog key names.
+  // NOTE: If you add to this list you must update GetWatchTimeKeys() and if
+  // necessary, GetWatchTimePowerKeys().
   static const char kWatchTimeAudioAll[];
   static const char kWatchTimeAudioMse[];
   static const char kWatchTimeAudioEme[];
   static const char kWatchTimeAudioSrc[];
   static const char kWatchTimeAudioBattery[];
   static const char kWatchTimeAudioAc[];
   static const char kWatchTimeAudioEmbeddedExperience[];
   static const char kWatchTimeAudioVideoAll[];
   static const char kWatchTimeAudioVideoMse[];
   static const char kWatchTimeAudioVideoEme[];
   static const char kWatchTimeAudioVideoSrc[];
   static const char kWatchTimeAudioVideoBattery[];
   static const char kWatchTimeAudioVideoAc[];
   static const char kWatchTimeAudioVideoEmbeddedExperience[];
+  static const char kWatchTimeAudioVideoBackgroundAll[];
+  static const char kWatchTimeAudioVideoBackgroundMse[];
+  static const char kWatchTimeAudioVideoBackgroundEme[];
+  static const char kWatchTimeAudioVideoBackgroundSrc[];
+  static const char kWatchTimeAudioVideoBackgroundBattery[];
+  static const char kWatchTimeAudioVideoBackgroundAc[];
+  static const char kWatchTimeAudioVideoBackgroundEmbeddedExperience[];
 
   // Markers which signify the watch time should be finalized immediately.
   static const char kWatchTimeFinalize[];
   static const char kWatchTimeFinalizePower[];
 
+  static base::flat_set<base::StringPiece> GetWatchTimeKeys();
+  static base::flat_set<base::StringPiece> GetWatchTimePowerKeys();
+
  protected:
   friend class base::RefCountedThreadSafe<MediaLog>;
   virtual ~MediaLog();
 
  private:
   // A unique (to this process) id for this MediaLog.
   int32_t id_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaLog);
 };
@@ skipping 34 matching lines @@
 #define LIMITED_MEDIA_LOG(level, media_log, count, max)                       \
   LAZY_STREAM(MEDIA_LOG(level, media_log),                                    \
               (count) < (max) && ((count)++ || true))                         \
       << (((count) == (max)) ? "(Log limit reached. Further similar entries " \
                                "may be suppressed): "                         \
                              : "")
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_LOG_H_