Change scripts to avoid generating things that bloat the compiled code

tools/dom/scripts/generator.py

Index: tools/dom/scripts/generator.py
diff --git a/tools/dom/scripts/generator.py b/tools/dom/scripts/generator.py
index a5488b255af3f3d4bc049008f825d20c45decfa1..85e0d9ef190fa644ba381a93115d15751dfe22c1 100644
--- a/tools/dom/scripts/generator.py
+++ b/tools/dom/scripts/generator.py
@@ -1378,6 +1378,11 @@ _idl_type_registry = monitored.Dict('generator._idl_type_registry', {
     'SVGTransform': TypeData(clazz='SVGTearOff', native_type="SVGPropertyTearOff<SVGTransform>"),
     'SVGTransformList': TypeData(clazz='SVGTearOff', item_type='SVGTransform',
         native_type='SVGTransformListPropertyTearOff'),
+
+    # TODO(alanknight): A better way to handle typedef ordering issues.
+    'DOMHighResTimeStamp': TypeData(clazz='Primitive', dart_type='num', native_type='double'),
+    'PerformanceEntryList': TypeData(clazz='Interface', dart_type='List<PerformanceEntry>'),
+    'JSON': TypeData(clazz='Primitive', dart_type='Object'),
 })
 
 _svg_supplemental_includes = [