Add MediaError.message

third_party/WebKit/public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 141 matching lines @@
   // Getters of playback state.
   virtual bool Paused() const = 0;
   virtual bool Seeking() const = 0;
   virtual double Duration() const = 0;
   virtual double CurrentTime() const = 0;
 
   // Internal states of loading and network.
   virtual NetworkState GetNetworkState() const = 0;
   virtual ReadyState GetReadyState() const = 0;
 
-  virtual WebString GetErrorMessage() = 0;
+  // Returns an implementation-specific human readable error message, or an
+  // empty string if no message is available. The message should begin with a
+  // UA-specific-error-code (without any ':'), optionally followed by ': ' and
+  // further description of the error.
+  virtual WebString GetErrorMessage() const = 0;
+
   virtual bool DidLoadingProgress() = 0;
 
   virtual bool HasSingleSecurityOrigin() const = 0;
   virtual bool DidPassCORSAccessCheck() const = 0;
 
   virtual double MediaTimeForTimeValue(double time_value) const = 0;
 
   virtual unsigned DecodedFrameCount() const = 0;
   virtual unsigned DroppedFrameCount() const = 0;
   virtual unsigned CorruptedFrameCount() const { return 0; }
@@ skipping 113 matching lines @@
   virtual bool GetLastUploadedFrameInfo(unsigned* width,
                                         unsigned* height,
                                         double* timestamp) {
     return false;
   }
 };
 
 }  // namespace blink
 
 #endif