Removed IllegalAccessException and UnsupportedOperationException.

pkg/dartdoc/lib/src/mirrors/dart2js_mirror.dart

Index: pkg/dartdoc/lib/src/mirrors/dart2js_mirror.dart
diff --git a/pkg/dartdoc/lib/src/mirrors/dart2js_mirror.dart b/pkg/dartdoc/lib/src/mirrors/dart2js_mirror.dart
index 37eed486e7ae7b7923ffc038ec9b0d0ba1859286..cca755b1bbedc5be572c4bf87354f6087f6c0d23 100644
--- a/pkg/dartdoc/lib/src/mirrors/dart2js_mirror.dart
+++ b/pkg/dartdoc/lib/src/mirrors/dart2js_mirror.dart
@@ -757,7 +757,7 @@ class Dart2JsInterfaceMirror extends Dart2JsObjectMirror
   bool get isDeclaration => true;
 
   List<TypeMirror> get typeArguments {
-    throw new UnsupportedOperationException(
+    throw new UnsupportedError(
         'Declarations do not have type arguments');
   }
 
@@ -840,7 +840,7 @@ class Dart2JsTypedefMirror extends Dart2JsTypeElementMirror
   bool get isTypedef => true;
 
   List<TypeMirror> get typeArguments {
-    throw new UnsupportedOperationException(
+    throw new UnsupportedError(
         'Declarations do not have type arguments');
   }