Draggable peeking/fullscreen launcher with transparent background.

ash/shelf/wm_shelf.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/shelf/wm_shelf.h"
 
 #include "ash/public/cpp/config.h"
 #include "ash/public/cpp/shelf_item_delegate.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
@@ skipping 201 matching lines @@
 }
 
 void WmShelf::UpdateAutoHideState() {
   shelf_layout_manager_->UpdateAutoHideState();
 }
 
 ShelfBackgroundType WmShelf::GetBackgroundType() const {
   return shelf_widget_->GetBackgroundType();
 }
 
+void WmShelf::AppListIsActive(bool active) {
+  shelf_layout_manager()->AppListIsActive(active);
+}
+
 void WmShelf::UpdateVisibilityState() {
   if (shelf_layout_manager_)
     shelf_layout_manager_->UpdateVisibilityState();
 }
 
 ShelfVisibilityState WmShelf::GetVisibilityState() const {
   return shelf_layout_manager_ ? shelf_layout_manager_->visibility_state()
                                : SHELF_HIDDEN;
 }
 
@@ skipping 118 matching lines @@
 
 void WmShelf::OnAutoHideStateChanged(ShelfAutoHideState new_state) {
   for (auto& observer : observers_)
     observer.OnAutoHideStateChanged(new_state);
 }
 
 void WmShelf::OnBackgroundUpdated(ShelfBackgroundType background_type,
                                   AnimationChangeType change_type) {
   if (background_type == GetBackgroundType())
     return;
+
   for (auto& observer : observers_)
     observer.OnBackgroundTypeChanged(background_type, change_type);
 }
 
 }  // namespace ash