Switch SupportsUserData uses to use unique_ptr.

chrome/browser/ui/views/omnibox/omnibox_view_views.cc

Index: chrome/browser/ui/views/omnibox/omnibox_view_views.cc
diff --git a/chrome/browser/ui/views/omnibox/omnibox_view_views.cc b/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
index c878115e968e979f5e4edcce6b1f6a719a26b086..09ffc9e02941e67ec2d43e47540fa03ed06938ac 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
+++ b/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
@@ -173,8 +173,9 @@ void OmniboxViewViews::SaveStateToTab(content::WebContents* tab) {
   // NOTE: GetStateForTabSwitch() may affect GetSelectedRange(), so order is
   // important.
   OmniboxEditModel::State state = model()->GetStateForTabSwitch();
-  tab->SetUserData(OmniboxState::kKey, new OmniboxState(
-      state, GetSelectedRange(), saved_selection_for_focus_change_));
+  tab->SetUserData(OmniboxState::kKey, base::MakeUnique<OmniboxState>(
+                                           state, GetSelectedRange(),
+                                           saved_selection_for_focus_change_));
 }
 
 void OmniboxViewViews::OnTabChanged(const content::WebContents* web_contents) {