Media: Report informational error messages to HTMLMediaElement

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>
 
@@ skipping 26 matching lines @@
   static std::string PipelineStatusToString(PipelineStatus status);
 
   static std::string MediaEventToLogString(const MediaLogEvent& event);
 
   MediaLog();
 
   // Add an event to this log. Overriden by inheritors to actually do something
   // with it.
   virtual void AddEvent(scoped_ptr<MediaLogEvent> event);
 
+  // Retrieve an error message, if any.
+  virtual std::string GetLastErrorMessage();
+
   // Helper methods to create events and their parameters.
   scoped_ptr<MediaLogEvent> CreateEvent(MediaLogEvent::Type type);
   scoped_ptr<MediaLogEvent> CreateBooleanEvent(
       MediaLogEvent::Type type, const std::string& property, bool value);
   scoped_ptr<MediaLogEvent> CreateStringEvent(MediaLogEvent::Type type,
                                               const std::string& property,
                                               const std::string& value);
   scoped_ptr<MediaLogEvent> CreateTimeEvent(MediaLogEvent::Type type,
                                             const std::string& property,
                                             base::TimeDelta value);
@@ skipping 63 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_