NativeWidgetAura::ClearNativeFocus fix

ui/views/widget/native_widget_aura.cc

 // Copyright (c) 2011 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/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 510 matching lines @@
   if (window_)
     window_->SchedulePaintInRect(rect);
 }
 
 void NativeWidgetAura::SetCursor(gfx::NativeCursor cursor) {
   cursor_ = cursor;
   aura::RootWindow::GetInstance()->SetCursor(cursor);
 }
 
 void NativeWidgetAura::ClearNativeFocus() {
-  if (window_ && window_->GetFocusManager())
+  if (window_ && window_->GetFocusManager() &&
+      window_->Contains(window_->GetFocusManager()->GetFocusedWindow())) {
     window_->GetFocusManager()->SetFocusedWindow(window_);
+  }
 }
 
 void NativeWidgetAura::FocusNativeView(gfx::NativeView native_view) {
   window_->GetFocusManager()->SetFocusedWindow(native_view);
 }
 
 gfx::Rect NativeWidgetAura::GetWorkAreaBoundsInScreen() const {
   return gfx::Screen::GetMonitorWorkAreaNearestWindow(GetNativeView());
 }
 
@@ skipping 308 matching lines @@
   }
 }
 
 // static
 bool NativeWidgetPrivate::IsMouseButtonDown() {
   return aura::RootWindow::GetInstance()->IsMouseButtonDown();
 }
 
 }  // namespace internal
 }  // namespace views