Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/views/toolbar/app_menu.cc

Index: chrome/browser/ui/views/toolbar/app_menu.cc
diff --git a/chrome/browser/ui/views/toolbar/app_menu.cc b/chrome/browser/ui/views/toolbar/app_menu.cc
index 0a740c3cae693a957067a6b24fa4bd747a257d9b..5cee86832ae3396e4b4c76212220bbd13796c8b4 100644
--- a/chrome/browser/ui/views/toolbar/app_menu.cc
+++ b/chrome/browser/ui/views/toolbar/app_menu.cc
@@ -716,7 +716,8 @@ class AppMenu::ZoomView : public AppMenuView {
   // Index of the fullscreen menu item in the model.
   const int fullscreen_index_;
 
-  scoped_ptr<content::HostZoomMap::Subscription> browser_zoom_subscription_;
+  std::unique_ptr<content::HostZoomMap::Subscription>
+      browser_zoom_subscription_;
   content::NotificationRegistrar registrar_;
 
   // Button for incrementing the zoom.
@@ -1152,7 +1153,7 @@ void AppMenu::PopulateMenu(MenuItemView* parent, MenuModel* model) {
 
     switch (model->GetCommandIdAt(i)) {
       case IDC_EXTENSIONS_OVERFLOW_MENU: {
-        scoped_ptr<ExtensionToolbarMenuView> extension_toolbar(
+        std::unique_ptr<ExtensionToolbarMenuView> extension_toolbar(
             new ExtensionToolbarMenuView(browser_, this, item));
         if (ui::MaterialDesignController::IsModeMaterial()) {
           for (int i = 0; i < extension_toolbar->contents()->child_count();