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

ui/views/controls/native/native_view_host_win.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/views/controls/native/native_view_host_win.h"
 
 #include <oleacc.h>
 
 #include "base/logging.h"
 #include "ui/base/win/hidden_window.h"
@@ skipping 30 matching lines @@
 
   Widget::ReparentNativeView(host_->native_view(),
                              host_->GetWidget()->GetNativeView());
   host_->Layout();
 }
 
 void NativeViewHostWin::NativeViewDetaching(bool destroyed) {
   if (!destroyed) {
     if (installed_clip_)
       UninstallClip();
-    ClearFocus();
     SetParent(host_->native_view(), ui::GetHiddenWindow());
   }
   installed_clip_ = false;
 }
 
 void NativeViewHostWin::AddedToWidget() {
   if (!IsWindow(host_->native_view()))
     return;
   HWND parent_hwnd = GetParent(host_->native_view());
   HWND widget_hwnd = host_->GetWidget()->GetNativeView();
@@ skipping 79 matching lines @@
       hwnd, OBJID_CLIENT, IID_IAccessible,
       reinterpret_cast<void**>(&accessible));
 
   if (success == S_OK) {
     return accessible;
   } else {
     return NULL;
   }
 }
 
-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:
 
 // static
 NativeViewHostWrapper* NativeViewHostWrapper::CreateWrapper(
     NativeViewHost* host) {
   return new NativeViewHostWin(host);
 }
 
 }  // namespace views