CrOS - Make it possible to Alt+Tab while dragging a tab

ash/common/wm/window_cycle_list.cc

 // Copyright 2014 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/window_cycle_list.h"
 
 #include <list>
 #include <map>
 
 #include "ash/common/wm/mru_window_tracker.h"
@@ skipping 244 matching lines @@
     AddChildView(highlight_view_);
     AddChildView(mirror_container_);
   }
 
   ~WindowCycleView() override {}
 
   void SetTargetWindow(WmWindow* target) {
     target_window_ = target;
     if (GetWidget()) {
       Layout();
-      if (target_window_) {
-        // In the window destruction case, we may have already removed the
-        // focused view and hence not be the focused window. We should still
-        // always be active, though.
-        DCHECK_EQ(ash::WmShell::Get()->GetActiveWindow()->GetInternalWidget(),
-                  GetWidget());
+      if (target_window_)
         window_view_map_[target_window_]->RequestFocus();
-      }
     }
   }
 
   void HandleWindowDestruction(WmWindow* destroying_window,
                                WmWindow* new_target) {
     auto view_iter = window_view_map_.find(destroying_window);
     views::View* preview = view_iter->second;
     views::View* parent = preview->parent();
     DCHECK_EQ(mirror_container_, parent);
     window_view_map_.erase(view_iter);
@@ skipping 64 matching lines @@
       // never change).
       mirror_container_->layer()->SetAnimator(
           ui::LayerAnimator::CreateImplicitAnimator());
       // The selection highlight also animates all bounds changes and never
       // changes other animatable properties.
       highlight_view_->layer()->SetAnimator(
           ui::LayerAnimator::CreateImplicitAnimator());
     }
   }
 
-  void OnMouseCaptureLost() override {
-    WmShell::Get()->window_cycle_controller()->CancelCycling();
-  }
-
   void OnPaintBackground(gfx::Canvas* canvas) override {
     // We can't set a bg on the mirror container itself because the highlight
     // view needs to be on top of the bg but behind the target windows.
     const gfx::RectF shield_bounds(mirror_container_->bounds());
     SkPaint paint;
     paint.setColor(SkColorSetA(SK_ColorBLACK, 0xE6));
     paint.setStyle(SkPaint::kFill_Style);
     float corner_radius = 0.f;
     if (shield_bounds.width() < width()) {
       paint.setAntiAlias(true);
@@ skipping 174 matching lines @@
   gfx::Rect widget_rect = root_window->GetDisplayNearestWindow().bounds();
   const int widget_height = cycle_view_->GetPreferredSize().height();
   widget_rect.set_y(widget_rect.y() +
                     (widget_rect.height() - widget_height) / 2);
   widget_rect.set_height(widget_height);
   params.bounds = widget_rect;
   widget->Init(params);
 
   screen_observer_.Add(display::Screen::GetScreen());
   widget->Show();
-  widget->SetCapture(cycle_view_);
-  widget->set_auto_release_capture(false);
   cycle_ui_widget_ = widget;
 }
 
 }  // namespace ash