Revert "Revert "Constructors for IDBKeyRange""

lib/dom/src/native_FactoryProviders.dart

Index: lib/dom/src/native_FactoryProviders.dart
diff --git a/lib/dom/src/native_FactoryProviders.dart b/lib/dom/src/native_FactoryProviders.dart
index c82302364e64e0ce49b4524f5619d67cf628f2bb..74082985a140fbd307ff3f270f79ccce2085cbaf 100644
--- a/lib/dom/src/native_FactoryProviders.dart
+++ b/lib/dom/src/native_FactoryProviders.dart
@@ -59,3 +59,20 @@ class _WebKitPointFactoryProvider {
 class _WebSocketFactoryProvider {
   factory WebSocket(String url) => FactoryProviderImplementation.createWebSocket(url);
 }
+
+class _IDBKeyRangeFactoryProvider {
+
+  factory IDBKeyRange.only(/*IDBKey*/ value) =>
+      FactoryProviderImplementation.IDBKeyRange_only(value);
+
+  factory IDBKeyRange.lowerBound(/*IDBKey*/ bound, [bool open = false]) =>
+      FactoryProviderImplementation.IDBKeyRange_lowerBound(bound, open);
+
+  factory IDBKeyRange.upperBound(/*IDBKey*/ bound, [bool open = false]) =>
+      FactoryProviderImplementation.IDBKeyRange_upperBound(bound, open);
+
+  factory IDBKeyRange.bound(/*IDBKey*/ lower, /*IDBKey*/ upper,
+                            [bool lowerOpen = false, bool upperOpen = false]) =>
+      FactoryProviderImplementation.IDBKeyRange_bound(lower, upper,
+                                                      lowerOpen, upperOpen);
+}