Update profile switcher button on Linux.

ui/views/controls/button/label_button.cc

Index: ui/views/controls/button/label_button.cc
diff --git a/ui/views/controls/button/label_button.cc b/ui/views/controls/button/label_button.cc
index d1149469833ecdf21a83b9e23f1581f02b71f0d0..d74fc8dbe0e57ed754635d9d56a23c36747b9e8a 100644
--- a/ui/views/controls/button/label_button.cc
+++ b/ui/views/controls/button/label_button.cc
@@ -423,10 +423,12 @@ void LabelButton::AddInkDropLayer(ui::Layer* ink_drop_layer) {
   image()->SetPaintToLayer();
   image()->layer()->SetFillsBoundsOpaquely(false);
   ink_drop_container_->AddInkDropLayer(ink_drop_layer);
+  InstallInkDropMask(ink_drop_layer);

[Peter Kasting, 2017/04/27 02:13:18]

It looks from code search like several other places called AddInkDropLayer()
besides just here.  Don't you need to modify them too?  (For example,
BubbleIconView)

[Evan Stade, 2017/04/27 20:28:52]

They would need this if they were to use a mask, but I don't want to hunt them
all down. Adding this here doesn't make them any less (hypothetically) broken.

Removing the code but not adding back InstallInkDropMask() in InkDropHostView
was an oversight.

 }
 
 void LabelButton::RemoveInkDropLayer(ui::Layer* ink_drop_layer) {
   image()->DestroyLayer();
+  ResetInkDropMask();
   ink_drop_container_->RemoveInkDropLayer(ink_drop_layer);
 }