mojo: Make InterfacePtr<> testable in if() statements without .get().

mojo/services/view_manager/view_manager_init_service_impl.cc

Index: mojo/services/view_manager/view_manager_init_service_impl.cc
diff --git a/mojo/services/view_manager/view_manager_init_service_impl.cc b/mojo/services/view_manager/view_manager_init_service_impl.cc
index 9cb337bd6a6fae159f0b23c71e50d512d9d05e72..f7822fc0d3b5f6ec9e773b187235758260ae4f3d 100644
--- a/mojo/services/view_manager/view_manager_init_service_impl.cc
+++ b/mojo/services/view_manager/view_manager_init_service_impl.cc
@@ -44,7 +44,7 @@ void ViewManagerInitServiceImpl::MaybeEmbedRoot(
 void ViewManagerInitServiceImpl::EmbedRoot(
     const String& url,
     const Callback<void(bool)>& callback) {
-  if (connect_params_.get()) {
+  if (connect_params_) {
     DVLOG(1) << "Ignoring second connect";
     callback.Run(false);
     return;
@@ -58,7 +58,7 @@ void ViewManagerInitServiceImpl::EmbedRoot(
 void ViewManagerInitServiceImpl::OnRootViewManagerWindowTreeHostCreated() {
   DCHECK(!is_tree_host_ready_);
   is_tree_host_ready_ = true;
-  if (connect_params_.get())
+  if (connect_params_)
     MaybeEmbedRoot(connect_params_->url, connect_params_->callback);
 }