Go bindings: Change generated enum value constants to be typed as the enum type.

mojo/go/tests/enums_test.go

Index: mojo/go/tests/enums_test.go
diff --git a/mojo/go/tests/enums_test.go b/mojo/go/tests/enums_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..7b8bf2079e801e6b3ecbc332c17e7fb143bd953d
--- /dev/null
+++ b/mojo/go/tests/enums_test.go
@@ -0,0 +1,28 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package tests
+
+import (
+	"mojo/public/interfaces/bindings/tests/test_enums"
+	"testing"
+)
+
+func TestEnums(t *testing.T) {
+	if test_enums.TestEnum_Foo != IdentityEnum1(test_enums.TestEnum_Foo) {
+		t.Errorf("IdentityEnum1 failure.")
+	}
+
+	if test_enums.TestEnum2_Foo != IdentityEnum2(test_enums.TestEnum2_Foo) {
+		t.Errorf("IdentityEnum1 failure.")
+	}
+}
+
+func IdentityEnum1(x test_enums.TestEnum) test_enums.TestEnum {
+	return x
+}
+
+func IdentityEnum2(x test_enums.TestEnum2) test_enums.TestEnum2 {
+	return x
+}