Implement sidebar support for extension action popups

chrome/browser/ui/toolbar/toolbar_actions_bar.cc

Index: chrome/browser/ui/toolbar/toolbar_actions_bar.cc
diff --git a/chrome/browser/ui/toolbar/toolbar_actions_bar.cc b/chrome/browser/ui/toolbar/toolbar_actions_bar.cc
index fef0d5dd37075987dcb1293e4cf5fd644c5dc7cd..6bdb00c72e32ace1a86c27716cba95de8f8cb34f 100644
--- a/chrome/browser/ui/toolbar/toolbar_actions_bar.cc
+++ b/chrome/browser/ui/toolbar/toolbar_actions_bar.cc
@@ -120,6 +120,7 @@ ToolbarActionsBar::ToolbarActionsBar(ToolbarActionsBarDelegate* delegate,
       main_bar_(main_bar),
       platform_settings_(main_bar != nullptr),
       popup_owner_(nullptr),
+      sidebar_owner_(nullptr),
       model_observer_(this),
       suppress_layout_(false),
       suppress_animation_(true),
@@ -505,6 +506,21 @@ void ToolbarActionsBar::HideActivePopup() {
   DCHECK(!popup_owner_);
 }
 
+void ToolbarActionsBar::SetSidebarOwner(
+    ToolbarActionViewController* sidebar_owner) {
+  // We should never be setting a popup owner when one already exists, and
+  // never unsetting one when one wasn't set.
+  DCHECK((!sidebar_owner_ && sidebar_owner) ||
+         (sidebar_owner_ && !sidebar_owner));
+  sidebar_owner_ = sidebar_owner;
+}
+
+void ToolbarActionsBar::HideActiveSidebar() {
+  if (sidebar_owner_)
+    sidebar_owner_->HideSidebar();
+  DCHECK(!sidebar_owner_);
+}
+
 ToolbarActionViewController* ToolbarActionsBar::GetMainControllerForAction(
     ToolbarActionViewController* action) {
   return in_overflow_mode() ?