Disambiguate OnMouseCaptureLost from OnMouseReleased, etc.

views/controls/button/button_dropdown.cc

Index: views/controls/button/button_dropdown.cc
diff --git a/views/controls/button/button_dropdown.cc b/views/controls/button/button_dropdown.cc
index c2da5982ac487c75f04bd9751c3c15bcbe52272f..7afdbd5231a7bb406603ba6e5f19d0a67944999e 100644
--- a/views/controls/button/button_dropdown.cc
+++ b/views/controls/button/button_dropdown.cc
@@ -73,17 +73,12 @@ bool ButtonDropDown::OnMouseDragged(const MouseEvent& event) {
   return result;
 }
 
-void ButtonDropDown::OnMouseReleased(const MouseEvent& event, bool canceled) {
-  // Showing the drop down results in a MouseReleased with a canceled drag, we
-  // need to ignore it.
-  if (!canceled && (IsTriggerableEvent(event) ||
-      (event.IsRightMouseButton() && !HitTest(event.location())))) {
-    ImageButton::OnMouseReleased(event, canceled);
+void ButtonDropDown::OnMouseReleased(const MouseEvent& event) {
+  if (IsTriggerableEvent(event) ||
+      (event.IsRightMouseButton() && !HitTest(event.location()))) {
+    ImageButton::OnMouseReleased(event);
   }
 
-  if (canceled)
-    return;
-
   if (IsTriggerableEvent(event))
     show_menu_factory_.RevokeAll();