Pass Manifest JSON paser error line and column number to console.

third_party/WebKit/public/web/WebConsoleMessage.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 31 matching lines @@
         LevelInfo = 5,
         LevelWarning = 2,
         LevelError = 3,
         LevelRevokedError = 6,
         LevelLast = LevelInfo
     };
 
     Level level;
     WebString text;
     WebString url;
+    unsigned lineNumber;
+    unsigned columnNumber;
 
     WebConsoleMessage()
-        : level(LevelLog) { }
+        : level(LevelLog)
+        , lineNumber(0)
+        , columnNumber(0)
+    {
+    }
     WebConsoleMessage(Level level, const WebString& text)
         : level(level)
-        , text(text) { }
-    WebConsoleMessage(Level level, const WebString& text, const WebString& url)
-        : level(level)
         , text(text)
-        , url(url) { }
+        , lineNumber(0)
+        , columnNumber(0)
+    {
+    }
 };
 
 } // namespace blink
 
 #endif