Add MediaError.message

third_party/WebKit/public/platform/WebMediaPlayer.h

Index: third_party/WebKit/public/platform/WebMediaPlayer.h
diff --git a/third_party/WebKit/public/platform/WebMediaPlayer.h b/third_party/WebKit/public/platform/WebMediaPlayer.h
index 959631b40cca8fcf31cc8f83b13e9706a7a018e9..8f0f57a679be2e2307ce886f158e61ecf6fc5f52 100644
--- a/third_party/WebKit/public/platform/WebMediaPlayer.h
+++ b/third_party/WebKit/public/platform/WebMediaPlayer.h
@@ -40,6 +40,9 @@
 
 #include "cc/paint/paint_flags.h"
 
+#include <map>
+#include <vector>
+
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
@@ -159,7 +162,11 @@ class WebMediaPlayer {
   virtual NetworkState GetNetworkState() const = 0;
   virtual ReadyState GetReadyState() const = 0;
 
-  virtual WebString GetErrorMessage() = 0;
+  // Returns an implementation-specific map of error message types to a vector
+  // of error messages of that type for use in reporting to the web application.
+  virtual std::map<std::string, std::vector<std::string>> GetErrorMessages()
+      const = 0;
+
   virtual bool DidLoadingProgress() = 0;
 
   virtual bool HasSingleSecurityOrigin() const = 0;