Support default values for complex objects in mojom.

mojo/public/bindings/tests/sample_service_unittest.cc

 // Copyright 2014 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.
 
 #include <algorithm>
 #include <ostream>
 #include <string>
 
 #include "mojo/public/bindings/allocation_scope.h"
 #include "mojo/public/environment/environment.h"
@@ skipping 308 matching lines @@
   EXPECT_EQ(255, bar.alpha());
 
   Foo foo = Foo::Builder().Finish();
   ASSERT_FALSE(foo.name().is_null());
   EXPECT_EQ("Fooby", foo.name().To<std::string>());
   EXPECT_TRUE(foo.a());
   EXPECT_EQ(3u, foo.data().size());
   EXPECT_EQ(1, foo.data()[0]);
   EXPECT_EQ(2, foo.data()[1]);
   EXPECT_EQ(3, foo.data()[2]);
+
+  DefaultsTestInner inner = DefaultsTestInner::Builder().Finish();
+  EXPECT_EQ(1u, inner.names().size());
+  EXPECT_EQ("Jim", inner.names()[0].To<std::string>());
+  EXPECT_EQ(6*12, inner.height());
+
+  DefaultsTest full = DefaultsTest::Builder().Finish();
+  EXPECT_EQ(1u, full.people().size());
+  EXPECT_EQ(32, full.people()[0].age());
+  EXPECT_EQ(2u, full.people()[0].names().size());
+  EXPECT_EQ("Bob", full.people()[0].names()[0].To<std::string>());
+  EXPECT_EQ("Bobby", full.people()[0].names()[1].To<std::string>());
+  EXPECT_EQ(6*12, full.people()[0].height());
 }
 
 }  // namespace sample