Fix visibility of minimized panels when restoring from overview.

ash/wm/overview/scoped_transform_overview_window.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/wm/overview/scoped_transform_overview_window.h"
 
 #include "ash/shell.h"
 #include "ash/wm/window_state.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/screen_position_client.h"
@@ skipping 166 matching lines @@
     if (window_copy_)
       new CleanupWidgetAfterAnimationObserver(window_copy_, layer_);
     AnimateTransformOnWindowAndTransientChildren(original_transform_);
     window_copy_ = NULL;
     layer_ = NULL;
     if (minimized_ && window_->GetProperty(aura::client::kShowStateKey) !=
         ui::SHOW_STATE_MINIMIZED) {
       // Setting opacity 0 and visible false ensures that the property change
       // to SHOW_STATE_MINIMIZED will not animate the window from its original
       // bounds to the minimized position.
+      // Hiding the window needs to be done before the target opacity is 0,
+      // otherwise the layer's visibility will not be updated
+      // (See VisibilityController::UpdateLayerVisibility).
+      window_->Hide();
       window_->layer()->SetOpacity(0);
-      window_->Hide();
       window_->SetProperty(aura::client::kShowStateKey,
                            ui::SHOW_STATE_MINIMIZED);
     }
     ash::wm::GetWindowState(window_)->set_ignored_by_shelf(ignored_by_shelf_);
   } else if (window_copy_) {
     // If this class still owns a copy of the window, clean up the copy. This
     // will be the case if the window was destroyed.
     window_copy_->Close();
     if (layer_)
       views::corewm::DeepDeleteLayers(layer_);
@@ skipping 90 matching lines @@
     transient_child->SetTransform(transient_window_transform);
   }
 }
 
 void ScopedTransformOverviewWindow::OnOverviewStarted() {
   ash::wm::GetWindowState(window_)->set_ignored_by_shelf(true);
   RestoreWindow();
 }
 
 }  // namespace ash