fix(transpiler): support arrow functions with complex body in named arguments

tools/transpiler/spec/arrow_functions_spec.js

@@ -1,4 +1,4 @@
-import {describe, it, expect} from 'angular2/test_lib';
+import {describe, it, expect, iit} from 'angular2/test_lib';
 
 var inc = x => x + 1;
 
@@ -12,6 +12,10 @@ var max = (a, b) => {
   }
 };
 
+var namedFn = function({fn}) {
+  return fn();
+}
+
 class LexicalThis {
   zero;
 
@@ -30,6 +34,10 @@ export function main() {
       expect(inc(0)).toBe(1);
     });
 
+    it('should support implicit return in named arguments', function() {
+      expect(namedFn({fn: () => 1})).toBe(1);
+    });
+
     it('should support object literal', function() {
       var o = objLiteral('val');
       expect(o['key']).toBe('val');
@@ -40,9 +48,16 @@ export function main() {
       expect(max(1, 0)).toBe(1);
     });
 
+    it('should support complex body in named arguments', function() {
+      expect(namedFn({fn: () => {
+        return 1;
+      }})).toBe(1);
+    });
+
     it('should support lexical this', function() {
       var lthis = new LexicalThis();
       expect(lthis.getZero()).toBe(0);
     });
+
   });
 }

tools/transpiler/src/codegeneration/DartTransformer.js

@@ -25,8 +25,8 @@ export class DartTransformer extends MultiTransformer {
       });
     };
 
-    append(NamedParamsTransformer);
     append(ArrowFunctionTransformer);
+    append(NamedParamsTransformer);
     append(MultiVarTransformer);
     append(InstanceOfTransformer);
     append(StrictEqualityTransformer);