Remove insertRange.

sdk/lib/web_sql/dartium/web_sql_dartium.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  * **Caution:** this specification is no longer actively maintained by the Web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 370 matching lines @@
   }
 
   void setRange(int start, int end, Iterable<Map> iterable, [int skipCount]) {
     throw new UnsupportedError("Cannot setRange on immutable List.");
   }
 
   void removeRange(int start, int end) {
     throw new UnsupportedError("Cannot removeRange on immutable List.");
   }
 
-  void insertRange(int start, int rangeLength, [Map initialValue]) {
-    throw new UnsupportedError("Cannot insertRange on immutable List.");
-  }
-
   Iterable<Map> getRange(int start, int end) =>
     IterableMixinWorkaround.getRangeList(this, start, end);
 
   List<Map> sublist(int start, [int end]) {
     if (end == null) end = length;
     return Lists.getRange(this, start, end, <Map>[]);
   }
 
   Map<int, Map> asMap() =>
     IterableMixinWorkaround.asMapList(this);
@@ skipping 57 matching lines @@
 
 @DocsEditable
 @DomName('SQLTransactionSync')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 abstract class _SQLTransactionSync extends NativeFieldWrapperClass1 {
   _SQLTransactionSync.internal();
 
 }