dart2js: Implement instanceMembers and staticMembers.

runtime/lib/mirrors_impl.dart

Index: runtime/lib/mirrors_impl.dart
diff --git a/runtime/lib/mirrors_impl.dart b/runtime/lib/mirrors_impl.dart
index 7a337304068e4ec82e16bfa2bbc5b2286a68145b..0add1cdc5474b1ce9aaeb3ba2934240f268af735 100644
--- a/runtime/lib/mirrors_impl.dart
+++ b/runtime/lib/mirrors_impl.dart
@@ -567,8 +567,7 @@ class _LocalClassMirror extends _LocalObjectMirror
     if (_cachedStaticMembers == null) {
       var result = new Map<Symbol, MethodMirror>();
       declarations.values.forEach((decl) {
-        if (decl is MethodMirror && decl.isStatic &&
-            !decl.isConstructor && !decl.isAbstract) {
+        if (decl is MethodMirror && decl.isStatic && !decl.isConstructor) {
           result[decl.simpleName] = decl;
         }
         if (decl is VariableMirror && decl.isStatic) {
@@ -1086,7 +1085,7 @@ class _LocalLibraryMirror extends _LocalObjectMirror implements LibraryMirror {
     if (_cachedTopLevelMembers == null) {
       var result = new Map<Symbol, MethodMirror>();
       declarations.values.forEach((decl) {
-        if (decl is MethodMirror && !decl.isAbstract) {
+        if (decl is MethodMirror) {
           result[decl.simpleName] = decl;
         }
         if (decl is VariableMirror) {