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

third_party/WebKit/public/web/WebConsoleMessage.h

Index: third_party/WebKit/public/web/WebConsoleMessage.h
diff --git a/third_party/WebKit/public/web/WebConsoleMessage.h b/third_party/WebKit/public/web/WebConsoleMessage.h
index 21c4509102b21abd3a84861a325c0ee8ee1b76e6..d0a109c348648438725fa143008e69ce0fb816cf 100644
--- a/third_party/WebKit/public/web/WebConsoleMessage.h
+++ b/third_party/WebKit/public/web/WebConsoleMessage.h
@@ -49,16 +49,22 @@ struct WebConsoleMessage {
     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