Use mirror layer for minimized windows in overview mode

ash/wm/window_mirror_view.cc

Index: ash/wm/window_mirror_view.cc
diff --git a/ash/wm/window_mirror_view.cc b/ash/wm/window_mirror_view.cc
index a128a42bedaac454016f1802cd3c474963b4f05f..7ba91a8d13cbf82f2fadc342382a4351b471792f 100644
--- a/ash/wm/window_mirror_view.cc
+++ b/ash/wm/window_mirror_view.cc
@@ -6,6 +6,7 @@
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/wm/window_state.h"
+#include "ash/common/wm_window_property.h"
 #include "ash/wm/window_state_aura.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
@@ -102,6 +103,12 @@ ui::Layer* WindowMirrorView::GetMirrorLayer() {
 }
 
 gfx::Rect WindowMirrorView::GetClientAreaBounds() const {
+  int insets = target_->GetIntProperty(WmWindowProperty::TOP_VIEW_INSET);
+  if (insets > 0) {
+    gfx::Rect bounds(target_->GetBounds().size());
+    bounds.Inset(0, insets, 0, 0);
+    return bounds;
+  }
   // The target window may not have a widget in unit tests.
   if (!target_->GetInternalWidget())
     return gfx::Rect();