Add some ArgumentError and RangeError constructors that capture more information.

sdk/lib/web_sql/dart2js/web_sql_dart2js.dart

 /**
  * An API for storing data in the browser that can be queried with SQL.
  *
  * **Caution:** this specification is no longer actively maintained by the Web
  * Applications Working Group and may be removed at any time.
  * See [the W3C Web SQL Database specification](http://www.w3.org/TR/webdatabase/)
  * for more information.
  *
  * The [dart:indexed_db] APIs is a recommended alternatives.
  */
@@ skipping 200 matching lines @@
   // To suppress missing implicit constructor warnings.
   factory SqlResultSetRowList._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SQLResultSetRowList.length')
   @DocsEditable()
   int get length => JS("int", "#.length", this);
 
   Map operator[](int index) {
     if (JS("bool", "# >>> 0 !== # || # >= #", index,
         index, index, length))
-      throw new RangeError.range(index, 0, length);
+      throw new RangeError.index(index, this);
     return this.item(index);
   }
   void operator[]=(int index, Map value) {
     throw new UnsupportedError("Cannot assign element of immutable List.");
   }
   // -- start List<Map> mixins.
   // Map is the element type.
 
 
   void set length(int value) {
@@ skipping 70 matching lines @@
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental()
 // http://www.w3.org/TR/webdatabase/#sqltransactionsync
 @Experimental() // deprecated
 @Native("SQLTransactionSync")
 abstract class _SQLTransactionSync extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory _SQLTransactionSync._() { throw new UnsupportedError("Not supported"); }
 }