Mojo C++ bindings: add a new mode to generator to use native STL/WTF types

mojo/public/cpp/bindings/tests/equals_unittest.cc

Index: mojo/public/cpp/bindings/tests/equals_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/equals_unittest.cc b/mojo/public/cpp/bindings/tests/equals_unittest.cc
index 1add5b0b4043f8a0301a15ef4744858a714480ba..376c2bd4ff7bdba3e26e36da890051ae2efec80f 100644
--- a/mojo/public/cpp/bindings/tests/equals_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/equals_unittest.cc
@@ -61,32 +61,34 @@ TEST_F(EqualsTest, StructNested) {
 
 TEST_F(EqualsTest, Array) {
   NamedRegionPtr n1(NamedRegion::New());
-  n1->name = "n1";
-  n1->rects.push_back(CreateRect());
+  n1->name.emplace("n1");
+  n1->rects.emplace();
+  n1->rects->push_back(CreateRect());
   NamedRegionPtr n2(n1.Clone());
   EXPECT_TRUE(n1.Equals(n2));
 
-  n2->rects = nullptr;
+  n2->rects = base::nullopt;
   EXPECT_FALSE(n1.Equals(n2));
-  n2->rects.resize(0);
+  n2->rects.emplace();
   EXPECT_FALSE(n1.Equals(n2));
 
-  n2->rects.push_back(CreateRect());
-  n2->rects.push_back(CreateRect());
+  n2->rects->push_back(CreateRect());
+  n2->rects->push_back(CreateRect());
   EXPECT_FALSE(n1.Equals(n2));
 
-  n2->rects.resize(1);
-  n2->rects[0]->width = 0;
+  n2->rects->resize(1);
+  (*n2->rects)[0]->width = 0;
   EXPECT_FALSE(n1.Equals(n2));
 
-  n2->rects[0] = CreateRect();
+  (*n2->rects)[0] = CreateRect();
   EXPECT_TRUE(n1.Equals(n2));
 }
 
 TEST_F(EqualsTest, Map) {
   auto n1(NamedRegion::New());
-  n1->name = "foo";
-  n1->rects.push_back(CreateRect());
+  n1->name.emplace("foo");
+  n1->rects.emplace();
+  n1->rects->push_back(CreateRect());
 
   Map<std::string, NamedRegionPtr> m1;
   m1.insert("foo", std::move(n1));
@@ -98,15 +100,15 @@ TEST_F(EqualsTest, Map) {
   EXPECT_FALSE(m1.Equals(m2));
 
   m2 = m1.Clone();
-  m2.at("foo")->name = "monkey";
+  m2.at("foo")->name.emplace("monkey");
   EXPECT_FALSE(m1.Equals(m2));
 
   m2 = m1.Clone();
-  m2.at("foo")->rects.push_back(Rect::New());
+  m2.at("foo")->rects->push_back(Rect::New());
   EXPECT_FALSE(m1.Equals(m2));
 
-  m2.at("foo")->rects.resize(1);
-  m2.at("foo")->rects[0]->width = 1;
+  m2.at("foo")->rects->resize(1);
+  (*m2.at("foo")->rects)[0]->width = 1;
   EXPECT_FALSE(m1.Equals(m2));
 
   m2 = m1.Clone();