overview: Fix issue with rounded corners left on windows.

This happens when entering overview normal, then exit via swiping up
swipe up on shelf. So we have to update the rounded corners on the
normal window, even when a window is minimized.

Test: manual
Bug: 989149
Change-Id: I85791484fba9ea165e554c09b6d89a893ce5e2b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1727689Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683441}

ash/wm/overview/overview_grid.cc

@@ -832,7 +832,7 @@ void OverviewGrid::OnPostWindowStateTypeChange(WindowState* window_state,
     return;
 
   // When swiping away overview mode via shelf, windows will get minimized, but
-  // we do not want to create minimized widgets in their place.
+  // we do not want show a mirrored view in this case.
   if (overview_session_->enter_exit_overview_type() ==
       OverviewSession::EnterExitOverviewType::kSwipeFromShelf) {
     return;

ash/wm/overview/overview_item.cc

@@ -661,8 +661,8 @@ void OverviewItem::UpdatePhantomsForDragging(
   }
 
   const gfx::Point location = gfx::ToRoundedPoint(location_in_screen);
-    window->layer()->SetOpacity(DragWindowController::GetDragWindowOpacity(
-        root_window_, window, location));
+  window->layer()->SetOpacity(DragWindowController::GetDragWindowOpacity(
+      root_window_, window, location));
   phantoms_for_dragging_->Update(location);
 }
 

ash/wm/overview/scoped_overview_transform_window.cc

@@ -383,20 +383,19 @@ void ScopedOverviewTransformWindow::UpdateWindowDimensionsType() {
 
 void ScopedOverviewTransformWindow::UpdateRoundedCorners(bool show,
                                                          bool update_clip) {
-  // Minimized windows have their corners rounded in CaptionContainerView.
-  if (IsMinimized())
-    return;
-
+  // Hide the corners if minimized, CaptionContainerView will handle showing the
+  // rounded corners on the UI.
+  const bool show_corners = show && !IsMinimized();
   // Add the mask which gives the overview item rounded corners, and add the
   // shadow around the window.
   ui::Layer* layer = window_->layer();
   const float scale = layer->transform().Scale2d().x();
-  const gfx::RoundedCornersF radii(show ? kOverviewWindowRoundingDp / scale
-                                        : 0.0f);
+  const gfx::RoundedCornersF radii(
+      show_corners ? kOverviewWindowRoundingDp / scale : 0.0f);
   layer->SetRoundedCornerRadius(radii);
   layer->SetIsFastRoundedCorner(true);
 
-  if (!update_clip || layer->GetAnimator()->is_animating())
+  if (!update_clip || layer->GetAnimator()->is_animating() || IsMinimized())
     return;
 
   const int top_inset = GetTopInset();