Attempt 2 at: Fixes crash that occured because NativeViewHostAura::Detach was not

ui/views/controls/native/native_view_host_win.cc

Index: ui/views/controls/native/native_view_host_win.cc
diff --git a/ui/views/controls/native/native_view_host_win.cc b/ui/views/controls/native/native_view_host_win.cc
index 72e8d42a7edf0e8d1d0fc9d26d43504e20e70289..4916752cfde93c7953976fcca7fc9b5b233c8ccf 100644
--- a/ui/views/controls/native/native_view_host_win.cc
+++ b/ui/views/controls/native/native_view_host_win.cc
@@ -48,7 +48,6 @@ void NativeViewHostWin::NativeViewDetaching(bool destroyed) {
   if (!destroyed) {
     if (installed_clip_)
       UninstallClip();
-    ClearFocus();
     SetParent(host_->native_view(), ui::GetHiddenWindow());
   }
   installed_clip_ = false;
@@ -148,20 +147,6 @@ gfx::NativeViewAccessible NativeViewHostWin::GetNativeViewAccessible() {
   }
 }
 
-void NativeViewHostWin::ClearFocus() {
-  FocusManager* focus_manager = host_->GetFocusManager();
-  if (!focus_manager || !focus_manager->GetFocusedView())
-    return;
-
-  Widget::Widgets widgets;
-  Widget::GetAllChildWidgets(host_->native_view(), &widgets);
-  for (Widget::Widgets::iterator i = widgets.begin(); i != widgets.end(); ++i) {
-    focus_manager->ViewRemoved((*i)->GetRootView());
-    if (!focus_manager->GetFocusedView())
-      return;
-  }
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // NativeViewHostWrapper, public: