Block incognito browser windows for voice interaction.

ui/wm/core/window_util.cc

 // Copyright (c) 2012 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 "ui/wm/core/window_util.h"
 
 #include "base/memory/ptr_util.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_tree_owner.h"
 #include "ui/wm/core/transient_window_manager.h"
 #include "ui/wm/public/activation_client.h"
 
 namespace {
 
-// Invokes RecreateLayer() on all the children of |to_clone|, adding the newly
-// cloned children to |parent|.
+// Invokes |map_func| on all the children of |to_clone|, adding the newly
+// cloned children to |parent|. If |map_func| returns nullptr on
+// the layer owner, all its layer's children will not be cloned.
 //
 // WARNING: It is assumed that |parent| is ultimately owned by a LayerTreeOwner.
-void CloneChildren(ui::Layer* to_clone, ui::Layer* parent) {
+void CloneChildren(ui::Layer* to_clone,
+                   ui::Layer* parent,
+                   const wm::MapLayerFunc& map_func) {
   typedef std::vector<ui::Layer*> Layers;
   // Make a copy of the children since RecreateLayer() mutates it.
   Layers children(to_clone->children());
   for (Layers::const_iterator i = children.begin(); i != children.end(); ++i) {
     ui::LayerOwner* owner = (*i)->owner();
-    ui::Layer* old_layer = owner ? owner->RecreateLayer().release() : NULL;
+    ui::Layer* old_layer = owner ? map_func.Run(owner).release() : NULL;
     if (old_layer) {
       parent->Add(old_layer);
       // RecreateLayer() moves the existing children to the new layer. Create a
       // copy of those.
-      CloneChildren(owner->layer(), old_layer);
+      CloneChildren(owner->layer(), old_layer, map_func);
     }
   }
 }
 
 // Invokes Mirror() on all the children of |to_mirror|, adding the newly cloned
 // children to |parent|.
 //
 // WARNING: It is assumed that |parent| is ultimately owned by a LayerTreeOwner.
 void MirrorChildren(ui::Layer* to_mirror,
                     ui::Layer* parent,
@@ skipping 82 matching lines @@
 }
 
 aura::Window* GetToplevelWindow(aura::Window* window) {
   aura::client::ActivationClient* client =
       aura::client::GetActivationClient(window->GetRootWindow());
   return client ? client->GetToplevelWindow(window) : NULL;
 }
 
 std::unique_ptr<ui::LayerTreeOwner> RecreateLayers(ui::LayerOwner* root) {
   DCHECK(root->OwnsLayer());
-  auto old_layer = base::MakeUnique<ui::LayerTreeOwner>(root->RecreateLayer());
-  CloneChildren(root->layer(), old_layer->root());
+  return RecreateLayersWithClosure(root, base::Bind([](ui::LayerOwner* owner) {
+                                     return owner->RecreateLayer();
+                                   }));
+}
+
+std::unique_ptr<ui::LayerTreeOwner> RecreateLayersWithClosure(
+    ui::LayerOwner* root,
+    const MapLayerFunc& map_func) {
+  DCHECK(root->OwnsLayer());
+  auto layer = map_func.Run(root);
+  if (!layer)
+    return nullptr;
+  auto old_layer = base::MakeUnique<ui::LayerTreeOwner>(std::move(layer));
+  CloneChildren(root->layer(), old_layer->root(), map_func);
   return old_layer;
 }
 
 std::unique_ptr<ui::LayerTreeOwner> MirrorLayers(
     ui::LayerOwner* root, bool sync_bounds) {
   auto mirror = base::MakeUnique<ui::LayerTreeOwner>(root->layer()->Mirror());
   MirrorChildren(root->layer(), mirror->root(), sync_bounds);
   return mirror;
 }
 
@@ skipping 28 matching lines @@
 bool HasTransientAncestor(const aura::Window* window,
                           const aura::Window* ancestor) {
   const aura::Window* transient_parent = GetTransientParent(window);
   if (transient_parent == ancestor)
     return true;
   return transient_parent ?
       HasTransientAncestor(transient_parent, ancestor) : false;
 }
 
 }  // namespace wm