Adding streams to dart:html.

sdk/lib/indexed_db/dartium/indexed_db_dartium.dart

Index: sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
diff --git a/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart b/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
index 445f2febef3652cf7d2dabdf9d19447b82e402d2..74a659876ae6111c7b1079556e74141254c9018b 100644
--- a/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
+++ b/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
@@ -1,5 +1,6 @@
 library indexed_db;
 
+import 'dart:async';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
@@ -119,6 +120,12 @@ class CursorWithValue extends Cursor {
 class Database extends EventTarget {
   Database.internal() : super.internal();
 
+  static const EventStreamProvider<Event> abortEvent = const EventStreamProvider<Event>('abort');
+
+  static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
+
+  static const EventStreamProvider<UpgradeNeededEvent> versionChangeEvent = const EventStreamProvider<UpgradeNeededEvent>('versionchange');
+
   /// @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent; @docsEditable true
   DatabaseEvents get on =>
     new DatabaseEvents(this);
@@ -184,6 +191,12 @@ class Database extends EventTarget {
   /** @domName IDBDatabase.transaction_3 */
   Transaction _transaction_3(storeName_OR_storeNames, mode) native "IDBDatabase_transaction_3_Callback";
 
+  Stream<Event> get onAbort => abortEvent.forTarget(this);
+
+  Stream<Event> get onError => errorEvent.forTarget(this);
+
+  Stream<UpgradeNeededEvent> get onVersionChange => versionChangeEvent.forTarget(this);
+
 }
 
 /// @docsEditable true
@@ -742,10 +755,18 @@ class ObjectStore extends NativeFieldWrapperClass1 {
 class OpenDBRequest extends Request implements EventTarget {
   OpenDBRequest.internal() : super.internal();
 
+  static const EventStreamProvider<Event> blockedEvent = const EventStreamProvider<Event>('blocked');
+
+  static const EventStreamProvider<VersionChangeEvent> upgradeNeededEvent = const EventStreamProvider<VersionChangeEvent>('upgradeneeded');
+
   /// @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent; @docsEditable true
   OpenDBRequestEvents get on =>
     new OpenDBRequestEvents(this);
 
+  Stream<Event> get onBlocked => blockedEvent.forTarget(this);
+
+  Stream<VersionChangeEvent> get onUpgradeNeeded => upgradeNeededEvent.forTarget(this);
+
 }
 
 /// @docsEditable true
@@ -770,6 +791,10 @@ class OpenDBRequestEvents extends RequestEvents {
 class Request extends EventTarget {
   Request.internal() : super.internal();
 
+  static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
+
+  static const EventStreamProvider<Event> successEvent = const EventStreamProvider<Event>('success');
+
   /// @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent; @docsEditable true
   RequestEvents get on =>
     new RequestEvents(this);
@@ -810,6 +835,10 @@ class Request extends EventTarget {
   /** @domName IDBRequest.removeEventListener */
   void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]) native "IDBRequest_removeEventListener_Callback";
 
+  Stream<Event> get onError => errorEvent.forTarget(this);
+
+  Stream<Event> get onSuccess => successEvent.forTarget(this);
+
 }
 
 /// @docsEditable true
@@ -834,6 +863,12 @@ class RequestEvents extends Events {
 class Transaction extends EventTarget {
   Transaction.internal() : super.internal();
 
+  static const EventStreamProvider<Event> abortEvent = const EventStreamProvider<Event>('abort');
+
+  static const EventStreamProvider<Event> completeEvent = const EventStreamProvider<Event>('complete');
+
+  static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
+
   /// @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent; @docsEditable true
   TransactionEvents get on =>
     new TransactionEvents(this);
@@ -874,6 +909,12 @@ class Transaction extends EventTarget {
   /** @domName IDBTransaction.removeEventListener */
   void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]) native "IDBTransaction_removeEventListener_Callback";
 
+  Stream<Event> get onAbort => abortEvent.forTarget(this);
+
+  Stream<Event> get onComplete => completeEvent.forTarget(this);
+
+  Stream<Event> get onError => errorEvent.forTarget(this);
+
 }
 
 /// @docsEditable true
@@ -937,10 +978,14 @@ class VersionChangeEvent extends Event {
 class VersionChangeRequest extends Request implements EventTarget {
   VersionChangeRequest.internal() : super.internal();
 
+  static const EventStreamProvider<Event> blockedEvent = const EventStreamProvider<Event>('blocked');
+
   /// @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent; @docsEditable true
   VersionChangeRequestEvents get on =>
     new VersionChangeRequestEvents(this);
 
+  Stream<Event> get onBlocked => blockedEvent.forTarget(this);
+
 }
 
 /// @docsEditable true