Revert 203217 "Revert 202987 "Reorder the NativeViews attached t..."

I reverted it yesterday because I thought it was burning the Aura tree. It turned out to be innocent so I'm putting it back.

TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/16256004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203402 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 9 insertions, 0 deletions

diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index c1f7487..5160bf6 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -340,6 +340,12 @@ void Window::StackChildAbove(Window* child, Window* target) {
   StackChildRelativeTo(child, target, STACK_ABOVE);
 }
 
+void Window::StackChildAtBottom(Window* child) {
+  if (children_.size() <= 1 || child == children_.front())
+    return;  // At the bottom already.
+  StackChildBelow(child, children_.front());
+}
+
 void Window::StackChildBelow(Window* child, Window* target) {
   StackChildRelativeTo(child, target, STACK_BELOW);
 }
diff --git a/ui/aura/window.h b/ui/aura/window.h
index baf34f1..a73f784 100644
--- a/ui/aura/window.h
+++ b/ui/aura/window.h
@@ -175,6 +175,9 @@ class AURA_EXPORT Window : public ui::LayerDelegate,
   // see WindowTest.StackingMadrigal for details.
   void StackChildAbove(Window* child, Window* target);
 
+  // Stacks the specified child of this window at the bottom of the z-order.
+  void StackChildAtBottom(Window* child);
+
   // Stacks |child| below |target|. Does nothing if |child| is already below
   // |target|.
   void StackChildBelow(Window* child, Window* target);