Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/presenter/app_list_presenter_impl.cc

Index: ui/app_list/presenter/app_list_presenter_impl.cc
diff --git a/ui/app_list/presenter/app_list_presenter_impl.cc b/ui/app_list/presenter/app_list_presenter_impl.cc
index 9fa5613fca946acea340239af1c1cd85735af108..c4ef309215f59c14134c09e053aa685c4a643e51 100644
--- a/ui/app_list/presenter/app_list_presenter_impl.cc
+++ b/ui/app_list/presenter/app_list_presenter_impl.cc
@@ -59,8 +59,10 @@ void AppListPresenterImpl::Show(int64_t display_id) {
     return;
 
   is_visible_ = true;
-  if (app_list_)
+  if (app_list_) {
     app_list_->OnTargetVisibilityChanged(GetTargetVisibility());
+    app_list_->OnVisibilityChanged(GetTargetVisibility(), display_id);
+  }
 
   if (view_) {
     ScheduleAnimation();
@@ -86,9 +88,10 @@ void AppListPresenterImpl::Dismiss() {
   DCHECK(view_);
 
   is_visible_ = false;
-  if (app_list_)
+  if (app_list_) {
     app_list_->OnTargetVisibilityChanged(GetTargetVisibility());
-
+    app_list_->OnVisibilityChanged(GetTargetVisibility(), GetDisplayId());
+  }
   // The dismissal may have occurred in response to the app list losing
   // activation. Otherwise, our widget is currently active. When the animation
   // completes we'll hide the widget, changing activation. If a menu is shown