Mojo C++ bindings: Generate InterfaceHandle<> instead of InterfacePtr<>.

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

Index: mojo/public/cpp/bindings/tests/binding_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/binding_unittest.cc b/mojo/public/cpp/bindings/tests/binding_unittest.cc
index b8d4cf482f1eb072aa342bf7e04e3c42f788de63..491a9fa409a4252c9c7accb7938905b9f5d9752b 100644
--- a/mojo/public/cpp/bindings/tests/binding_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/binding_unittest.cc
@@ -44,7 +44,7 @@ class ServiceImpl : public sample::Service {
   // sample::Service implementation
   void Frobinate(sample::FooPtr foo,
                  BazOptions options,
-                 sample::PortPtr port,
+                 mojo::InterfaceHandle<sample::Port> port,
                  const FrobinateCallback& callback) override {
     callback.Run(1);
   }
@@ -336,4 +336,4 @@ TEST_F(BindingTest, StrongBindingUnbindCompile) {
 }
 
 }  // namespace
-}  // mojo
+}  // namespace mojo