Changes to handle unresolved qualified identifiers.

tests/language/src/Prefix14Test.dart

+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+//
+// Use qualified symbols at various places.
+
+#library("Prefix14Test.dart");
+#import("library12.dart", prefix:"lib12");
+
+typedef lib12.Library12 myFunc(lib12.Library12 param);
+
+class myInterface implements lib12.Library12Interface {
+  myInterface(lib12.Library12 this.myfld);
+  lib12.Library12 addObjects(lib12.Library12 value1, lib12.Library12 value2) {
+    myfld.fld = (value1.fld + value2.fld + myfld.fld);
+    return myfld;
+  }
+  lib12.Library12 myfld;
+}
+
+
+class myClass extends lib12.Library12 {
+  myClass(int value) : super(value);
+  static lib12.Library12 func1() {
+    var i = new lib12.Library12(10);
+    return i;
+  }
+  static lib12.Library12 func2(lib12.Library12 param) {
+    return param;
+  }
+}
+
+class myClass1 {
+  myClass1(int value) : fld1 = new lib12.Library12(value);
+  lib12.Library12 fld1;
+}
+
+class myClass2 {
+  myClass2(lib12.Library12 this.fld2);
+  lib12.Library12 fld2;
+}
+
+main() {
+  var o = myClass.func1();
+  Expect.equals(2, o.func());
+  o = new myClass(10);
+  Expect.equals(10, o.fld);
+
+  myFunc func = myClass.func2;
+  Expect.equals(2, func(new lib12.Library12(10)).func());
+  Expect.equals(10, func(new lib12.Library12(10)).fld);
+
+  o = new myClass1(100);
+  Expect.equals(2, o.fld1.func());
+  Expect.equals(100, o.fld1.fld);
+
+  o = new myClass2(new lib12.Library12(200));
+  Expect.equals(2, o.fld2.func());
+  Expect.equals(200, o.fld2.fld);
+
+  o = new myInterface(new lib12.Library12(100));
+  Expect.equals(2, o.myfld.func());
+  Expect.equals(100, o.myfld.fld);
+  o = o.addObjects(new lib12.Library12(200), new lib12.Library12(300));
+  Expect.equals(2, o.func());
+  Expect.equals(600, o.fld);
+}