Update profile switcher button on Linux.

chrome/browser/ui/views/profiles/profile_chooser_view.cc

Index: chrome/browser/ui/views/profiles/profile_chooser_view.cc
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.cc b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
index 5018e8e2f8c96ceb857cb6ca3029bbee1f3a8659..f98aa228264ca15bf4b2b5fcefb5d0994edff05b 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.cc
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
@@ -546,6 +546,11 @@ bool ProfileChooserView::IsShowing() {
 }
 
 // static
+views::Widget* ProfileChooserView::GetCurrentBubbleWidget() {
+  return profile_bubble_ ? profile_bubble_->GetWidget() : nullptr;
+}
+
+// static
 void ProfileChooserView::Hide() {
   if (IsShowing())
     profile_bubble_->GetWidget()->Close();