[win] Explicitly hide the bubble widget after creation.

ui/app_list/views/app_list_view.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/app_list/views/app_list_view.h"
 
 #include "base/string_util.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_view_delegate.h"
@@ skipping 89 matching lines @@
 #if defined(USE_AURA)
   GetWidget()->GetNativeWindow()->layer()->SetMasksToBounds(true);
   GetBubbleFrameView()->set_background(new AppListBackground(
       GetBubbleFrameView()->bubble_border()->GetBorderCornerRadius(),
       app_list_main_view_->search_box_view()));
   set_background(NULL);
 #else
   set_background(new AppListBackground(
       GetBubbleFrameView()->bubble_border()->GetBorderCornerRadius(),
       app_list_main_view_->search_box_view()));
+
+  // On non-aura the bubble has two widgets, and it's possible for the border
+  // to be shown independently in odd situations. Explicitly hide the bubble
+  // widget to ensure that any WM_WINDOWPOSCHANGED messages triggered by the
+  // window manager do not have the SWP_SHOWWINDOW flag set which would cause
+  // the border to be shown. See http://crbug.com/231687 .
+  GetWidget()->Hide();
 #endif
 }
 
 void AppListView::SetBubbleArrow(views::BubbleBorder::Arrow arrow) {
   GetBubbleFrameView()->bubble_border()->set_arrow(arrow);
   SizeToContents();  // Recalcuates with new border.
   GetBubbleFrameView()->SchedulePaint();
 }
 
 void AppListView::SetAnchorPoint(const gfx::Point& anchor_point) {
@@ skipping 103 matching lines @@
 
 void AppListView::OnSigninSuccess() {
   OnSigninStatusChanged();
 }
 
 SigninDelegate* AppListView::GetSigninDelegate() {
   return delegate_ ? delegate_->GetSigninDelegate() : NULL;
 }
 
 }  // namespace app_list