Implements Aura:: NativeWidgetPrivate::ReparentNativeView

BUG=102576
TEST=None


Review URL: http://codereview.chromium.org/8741022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113130 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/sad_tab_observer.cc

@@ -69,8 +69,9 @@ gfx::NativeView SadTabObserver::AcquireSadTab(base::TerminationStatus status) {
       SadTabView::KILLED : SadTabView::CRASHED;
   views::Widget::InitParams sad_tab_params(
       views::Widget::InitParams::TYPE_CONTROL);
-  // It is not possible to create a widget that has no parent, and later
-  // re-parent it. TODO(avi): This is a cheat. Can this be made cleaner?
+  // It is not possible to create a native_widget_win that has no parent in
+  // and later re-parent it.
+  // TODO(avi): This is a cheat. Can this be made cleaner?
   sad_tab_params.parent_widget =
       static_cast<TabContentsViewViews*>(tab_contents()->view());
   sad_tab_params.ownership =

ui/views/widget/native_widget_aura.cc

@@ -764,8 +764,29 @@ void NativeWidgetPrivate::GetAllChildWidgets(gfx::NativeView native_view,
 // static
 void NativeWidgetPrivate::ReparentNativeView(gfx::NativeView native_view,
                                              gfx::NativeView new_parent) {
-  // http://crbug.com/102576
-  NOTIMPLEMENTED();
+  DCHECK(native_view != new_parent);
+
+  gfx::NativeView previous_parent = native_view->parent();
+  if (previous_parent == new_parent)
+    return;
+
+  Widget::Widgets widgets;
+  GetAllChildWidgets(native_view, &widgets);
+
+  // First notify all the widgets that they are being disassociated
+  // from their previous parent.
+  for (Widget::Widgets::iterator it = widgets.begin();
+      it != widgets.end(); ++it) {
+    (*it)->NotifyNativeViewHierarchyChanged(false, previous_parent);
+  }
+
+  native_view->SetParent(new_parent);
+
+  // And now, notify them that they have a brand new parent.
+  for (Widget::Widgets::iterator it = widgets.begin();
+      it != widgets.end(); ++it) {
+    (*it)->NotifyNativeViewHierarchyChanged(true, new_parent);
+  }
 }
 
 // static