Add MediaError.message

media/base/media_log.h

Index: media/base/media_log.h
diff --git a/media/base/media_log.h b/media/base/media_log.h
index cb0a6b622aabebf1853f7c26e5cf42f9352808fd..1a6e71667d6e9e6954119f1f80a61a2331bb23e5 100644
--- a/media/base/media_log.h
+++ b/media/base/media_log.h
@@ -8,9 +8,11 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <map>
 #include <memory>
 #include <sstream>
 #include <string>
+#include <vector>
 
 #include "base/containers/flat_set.h"
 #include "base/logging.h"
@@ -40,7 +42,8 @@ class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> {
   static std::string PipelineStatusToString(PipelineStatus status);
   static std::string BufferingStateToString(BufferingState state);
 
-  static std::string MediaEventToLogString(const MediaLogEvent& event);
+  static std::string MediaEventToLogString(const MediaLogEvent& event,
+                                           bool include_type);
 
   MediaLog();
 
@@ -48,8 +51,8 @@ class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> {
   // with it.
   virtual void AddEvent(std::unique_ptr<MediaLogEvent> event);
 
-  // Retrieve an error message, if any.
-  virtual std::string GetLastErrorMessage();
+  // Retrieve error messages, if any, keyed by error type.
+  virtual std::map<std::string, std::vector<std::string>> GetErrorMessages();
 
   // Records the domain and registry of the current frame security origin to a
   // Rappor privacy-preserving metric. See: