fixes #616, statics on callable functions

test/codegen_expected/language/call_operator_test.js

 dart_library.library('language/call_operator_test', null, /* Imports */[
   'dart_sdk',
   'expect'
 ], function load__call_operator_test(exports, dart_sdk, expect) {
   'use strict';
   const core = dart_sdk.core;
   const dart = dart_sdk.dart;
   const dartx = dart_sdk.dartx;
   const expect$ = expect.expect;
   const call_operator_test = Object.create(null);
   let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
   call_operator_test.A1 = dart.callableClass(function A1(...args) {
-    const self = this;
     function call(...args) {
-      return self.call.apply(self, args);
+      return call.call.apply(call, args);
     }
     call.__proto__ = this.__proto__;
     call.new.apply(call, args);
     return call;
   }, class A1 extends core.Object {
     call() {
       return 42;
     }
   });
   dart.setSignature(call_operator_test.A1, {
     methods: () => ({call: dart.definiteFunctionType(dart.dynamic, [])})
   });
   call_operator_test.A2 = dart.callableClass(function A2(...args) {
-    const self = this;
     function call(...args) {
-      return self.call.apply(self, args);
+      return call.call.apply(call, args);
     }
     call.__proto__ = this.__proto__;
     call.new.apply(call, args);
     return call;
   }, class A2 extends core.Object {
     call() {
       return 35;
     }
   });
   dart.setSignature(call_operator_test.A2, {
     methods: () => ({call: dart.definiteFunctionType(core.int, [])})
   });
   call_operator_test.B = dart.callableClass(function B(...args) {
-    const self = this;
     function call(...args) {
-      return self.call.apply(self, args);
+      return call.call.apply(call, args);
     }
     call.__proto__ = this.__proto__;
     call.new.apply(call, args);
     return call;
   }, class B extends core.Object {
     call() {
       return 28;
     }
   });
   dart.setSignature(call_operator_test.B, {
     methods: () => ({call: dart.definiteFunctionType(dart.dynamic, [])})
   });
   call_operator_test.C = dart.callableClass(function C(...args) {
-    const self = this;
     function call(...args) {
-      return self.call.apply(self, args);
+      return call.call.apply(call, args);
     }
     call.__proto__ = this.__proto__;
     call.new.apply(call, args);
     return call;
   }, class C extends core.Object {
     call(arg) {
       return 7 * dart.notNull(core.num._check(arg));
     }
   });
   dart.setSignature(call_operator_test.C, {
     methods: () => ({call: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])})
   });
   call_operator_test.D = dart.callableClass(function D(...args) {
-    const self = this;
     function call(...args) {
-      return self.call.apply(self, args);
+      return call.call.apply(call, args);
     }
     call.__proto__ = this.__proto__;
     call.new.apply(call, args);
     return call;
   }, class D extends core.Object {
     call(arg) {
       if (arg === void 0) arg = 6;
       return 7 * dart.notNull(core.num._check(arg));
     }
   });
   dart.setSignature(call_operator_test.D, {
     methods: () => ({call: dart.definiteFunctionType(dart.dynamic, [], [dart.dynamic])})
   });
   call_operator_test.E = dart.callableClass(function E(...args) {
-    const self = this;
     function call(...args) {
-      return self.call.apply(self, args);
+      return call.call.apply(call, args);
     }
     call.__proto__ = this.__proto__;
     call.new.apply(call, args);
     return call;
   }, class E extends core.Object {
     call(str, opts) {
       let count = opts && 'count' in opts ? opts.count : 1;
       let buffer = new core.StringBuffer();
       for (let i = 0; i < dart.notNull(count); i++) {
         buffer.write(str);
@@ skipping 34 matching lines @@
     expect$.Expect.equals("foo", e.call("foo"));
     expect$.Expect.equals("foo:foo", e.call("foo", {count: 2}));
     expect$.Expect.equals("foo:foo:foo", e.call("foo", {count: 3}));
     expect$.Expect.isTrue(core.Function.is(a1));
     expect$.Expect.isTrue(core.Function.is(e));
   };
   dart.fn(call_operator_test.main, VoidTodynamic());
   // Exports:
   exports.call_operator_test = call_operator_test;
 });