[Extensions] Support choices in autogenerated movable types

tools/json_schema_compiler/test/objects_unittest.cc

 // Copyright (c) 2012 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 <stddef.h>
 
 #include "base/json/json_writer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/json_schema_compiler/test/objects.h"
 #include "tools/json_schema_compiler/test/objects_movable.h"
@@ skipping 78 matching lines @@
     pod.foo = FOO_BAZ;
     pod.str = "str2";
     pod.num = 45;
     pod.b = false;
     pods.push_back(std::move(pod));
   }
   MovableParent parent;
   parent.pods = std::move(pods);
   parent.strs.push_back("pstr");
   parent.blob.additional_properties.SetString("key", "val");
+  parent.choice.as_string.reset(new std::string("string"));
 
   MovableParent parent2(std::move(parent));
   ASSERT_EQ(2u, parent2.pods.size());
   EXPECT_EQ(FOO_BAR, parent2.pods[0].foo);
   EXPECT_EQ("str1", parent2.pods[0].str);
   EXPECT_EQ(42, parent2.pods[0].num);
   EXPECT_TRUE(parent2.pods[0].b);
   EXPECT_EQ(FOO_BAZ, parent2.pods[1].foo);
   EXPECT_EQ("str2", parent2.pods[1].str);
   EXPECT_EQ(45, parent2.pods[1].num);
   EXPECT_FALSE(parent2.pods[1].b);
   ASSERT_EQ(1u, parent2.strs.size());
   EXPECT_EQ("pstr", parent2.strs[0]);
+  ASSERT_TRUE(parent2.choice.as_string.get());
+  EXPECT_EQ("string", *parent2.choice.as_string);

[asargent_no_longer_on_chrome, 2016/03/31 21:56:34]

maybe also add a test of as_movable_pod?

[Devlin, 2016/04/01 00:09:01]

Done.

   std::string blob_string;
   EXPECT_TRUE(
       parent2.blob.additional_properties.GetString("key", &blob_string));
   EXPECT_EQ("val", blob_string);
 
   MovableWithAdditional with_additional;
   with_additional.str = "str";
   std::vector<std::string> vals1;
   vals1.push_back("vals1a");
   vals1.push_back("vals1b");
   with_additional.additional_properties["key1"] = vals1;
   std::vector<std::string> vals2;
   vals2.push_back("vals2a");
   vals2.push_back("vals2b");
   with_additional.additional_properties["key2"] = vals2;
 
   MovableWithAdditional with_additional2(std::move(with_additional));
   EXPECT_EQ("str", with_additional2.str);
   EXPECT_EQ(2u, with_additional2.additional_properties.size());
   EXPECT_EQ(vals1, with_additional2.additional_properties["key1"]);
   EXPECT_EQ(vals2, with_additional2.additional_properties["key2"]);
 }