Treat EventTarget as a secondary superclass

This matches the C++.  It's brittle, but it's not clear how to get
this out of idl right now.

R=blois@google.com

Review URL: https://codereview.chromium.org//22594012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@25906 260f80e4-7a28-3924-810f-c04153c831b5

tests/html/html.status

@@ -25,23 +25,16 @@ audiobuffersourcenode_test: Pass, Fail, Crash # http://crbug.com/256601
 # postMessage in dartium always transfers the typed array buffer, never a view
 postmessage_structured_test/typed_arrays: Fail
 # TODO(vsm): Triage from latest Blink merge
-indexeddb_1_test: Skip
 indexeddb_2_test: Skip
 indexeddb_3_test: Skip
 indexeddb_4_test: Skip
 indexeddb_5_test: Skip
 js_test: Skip
-js_interop_2_test: Skip
 js_interop_4_test: Skip
-xhr_test: Skip
 crypto_test: Skip
 notifications_test: Skip
 dromaeo_smoke_test: Skip
 native_gc_test: Skip
-location_test: Skip
-history_test: Skip
-postmessage_structured_test: Skip # Timing out
-form_data_test: Skip # Timing out
 
 [ $compiler == none && $runtime == drt && $system == windows ]
 worker_test/functional: Pass, Crash # Issue 9929.

tools/dom/idl/dart/dart.idl

@@ -338,5 +338,3 @@ interface Location {
 [Supplemental]
 interface Window : EventTarget {};
 
-[Supplemental]
-interface AbstractWorker : EventTarget {};

tools/dom/scripts/database.py

@@ -256,10 +256,6 @@ class Database(object):
     def walk(parents):
       for parent in parents:
         parent_name = parent.type.id
-        if parent_name == 'EventTarget':
-          # Currently EventTarget is implemented as a mixin, not a proper
-          # super interface---ignore its members.
-          continue
         if IsDartCollectionType(parent_name):
           result.append(parent_name)
           continue
@@ -271,7 +267,7 @@ class Database(object):
     result = []
     if interface.parents:
       parent = interface.parents[0]
-      if IsPureInterface(parent.type.id):
+      if IsPureInterface(parent.type.id) or parent.type.id == 'EventTarget':
         walk(interface.parents)
       else:
         walk(interface.parents[1:])