Update analyzer to reflect new rules for prefixes.

tests/language/prefix_unqualified_invocation_test.dart

 // Copyright (c) 2015, 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.
 
-// Validate that an attempt to invoke a prefix is handled consistently with the
-// following spec text from section 16.14.3 (Unqualified invocation):
+// Validate the following spec text from section 16.14.3 (Unqualified
+// invocation):
 //     An unqualifiedfunction invocation i has the form
 //     id(a1, ..., an, xn+1 : an+1, ..., xn+k : an+k),
 //     where id is an identifier.
 //     If there exists a lexically visible declaration named id, let fid be the
-//   innermost such declaration.  Then
-//     - If fid isa local function, a library function, a library or static
-//       getter or a variable then ...
-//     - Otherwise, if fid is a static method of the enclosing class C, ...
-//     - Otherwise, fid is considered equivalent to the ordinary method
-//       invocation this.id(a1, ..., an, xn+1 : an+1, ..., xn+k : an+k).
-//
-// Therefore, if p is an import prefix, evaluation of "p()" should be
-// equivalent to "this.p()".  That is, it should call the method "p"
-// dynamically if inside a method, and should produce a NoSucMethodError (and a
-// static warning) outside a method.
+//   innermost such declaration.  Then:
+//     - If fid is a prefix object, a compile-time error occurs.
 
-import "package:expect/expect.dart";
 import "empty_library.dart" as p;
 
 class Base {
-  var pCalled = false;
-
-  void p() {
-    pCalled = true;
-  }
+  void p() {}
 }
 
 class Derived extends Base {
   void f() {
-    p(); Expect.isTrue(pCalled); /// 01: ok
+    p(); /// 01: compile-time error
   }
 }
 
-noMethod(e) => e is NoSuchMethodError;
-
 main() {
   new Derived().f();
-  Expect.throws(() { p(); }, noMethod); /// 02: static type warning
+  p(); /// 02: compile-time error
 }