Use mirror layer for minimized windows in overview mode

ash/common/wm/overview/window_selector_item.cc

 // Copyright 2013 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/common/wm/overview/window_selector_item.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 423 matching lines @@
                                                  transform_window_.window());
     }
   }
   if (background_view_) {
     background_view_->OnItemRestored();
     background_view_ = nullptr;
   }
   FadeOut(std::move(window_label_));
 }
 
-void WindowSelectorItem::ShowWindowOnExit() {
-  transform_window_.ShowWindowOnExit();
-}
-
 void WindowSelectorItem::PrepareForOverview() {
   transform_window_.PrepareForOverview();
   UpdateHeaderLayout(HeaderFadeInMode::ENTER,
                      OverviewAnimationType::OVERVIEW_ANIMATION_NONE);
 }
 
 bool WindowSelectorItem::Contains(const WmWindow* target) const {
   return transform_window_.Contains(target);
 }
 
@@ skipping 51 matching lines @@
   // Fade out the window and the label, effectively hiding them.
   AnimateOpacity(0.0,
                  OverviewAnimationType::OVERVIEW_ANIMATION_CLOSE_SELECTOR_ITEM);
   transform_window_.Close();
 }
 
 void WindowSelectorItem::HideHeader() {
   transform_window_.HideHeader();
 }
 
+void WindowSelectorItem::OnMinimizedStateChanged() {
+  transform_window_.UpdateMirrorWindowForMinimizedState();
+}
+
 void WindowSelectorItem::SetDimmed(bool dimmed) {
   dimmed_ = dimmed;
   SetOpacity(dimmed ? kDimmedItemOpacity : 1.0f);
 }
 
 void WindowSelectorItem::ButtonPressed(views::Button* sender,
                                        const ui::Event& event) {
   if (sender == close_button_) {
     WmShell::Get()->RecordUserMetricsAction(UMA_WINDOW_OVERVIEW_CLOSE_BUTTON);
     CloseWindow();
@@ skipping 87 matching lines @@
   // |background_view_| will get added as a child to CaptionContainerView.
   views::Widget::InitParams params_label;
   params_label.type = views::Widget::InitParams::TYPE_POPUP;
   params_label.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params_label.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
   params_label.visible_on_all_workspaces = true;
   params_label.name = "OverviewModeLabel";
   params_label.activatable =
       views::Widget::InitParams::Activatable::ACTIVATABLE_DEFAULT;
   params_label.accept_events = true;
+  window_label_.reset(new views::Widget);

[varkha, 2016/11/08 00:02:56]

I guess this would not work with mus. Thanks for patching this!

   root_window_->GetRootWindowController()
       ->ConfigureWidgetInitParamsForContainer(
           window_label_.get(),
           transform_window_.window()->GetParent()->GetShellWindowId(),
           &params_label);
-  window_label_.reset(new views::Widget);
   window_label_->set_focus_on_creation(false);
   window_label_->Init(params_label);
   window_label_button_view_ = new OverviewLabelButton(this, title);
   window_label_button_view_->SetBorder(views::Border::NullBorder());
   window_label_button_view_->SetEnabledTextColors(kLabelColor);
   window_label_button_view_->set_animate_on_state_change(false);
   WmWindow* label_window =
       WmLookup::Get()->GetWindowForWidget(window_label_.get());
   if (transform_window_.GetTopInset()) {
     // For windows with headers the overview header fades in above the
@@ skipping 138 matching lines @@
   animation_settings->AddObserver(observer.get());
   window_selector_->delegate()->AddDelayedAnimationObserver(
       std::move(observer));
   widget_ptr->SetOpacity(0.f);
 }
 
 gfx::SlideAnimation* WindowSelectorItem::GetBackgroundViewAnimation() {
   return background_view_ ? background_view_->animation() : nullptr;
 }
 
+WmWindow* WindowSelectorItem::GetOverviewWindowForMinimizedStateForTest() {
+  return transform_window_.GetOverviewWindowForMinimizedState();
+}
+
 }  // namespace ash