Fix Panel to always detect when a tab is added.

chrome/browser/ui/panels/panel_browser_view_browsertest.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 "base/i18n/time_formatting.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/panels/base_panel_browser_test.h"
@@ skipping 276 matching lines @@
     browser_view1->OnTitlebarMousePressed(panel1->GetBounds().origin());
     browser_view1->OnTitlebarMouseDragged(
         panel1->GetBounds().origin().Subtract(gfx::Point(5, 5)));
     EXPECT_TRUE(panel_manager->ShouldBringUpTitlebars(
         0, 0));
     browser_view1->OnTitlebarMouseReleased();
 
     panel1->Close();
     panel2->Close();
     panel3->Close();
-    EXPECT_EQ(0, panel_manager->minimized_panel_count());
   }
 
   void TestDrawAttention() {
     Panel* panel = CreatePanel("PanelTest");
     PanelBrowserView* browser_view = GetBrowserView(panel);
     PanelBrowserFrameView* frame_view = browser_view->GetFrameView();
     frame_view->title_label_->SetAutoColorReadabilityEnabled(false);
     SkColor attention_color = frame_view->GetTitleColor(
         PanelBrowserFrameView::PAINT_FOR_ATTENTION);
 
@@ skipping 298 matching lines @@
 // TODO(jianli): Investigate why this fails on win trunk build.
 // http://crbug.com/102734
 IN_PROC_BROWSER_TEST_F(PanelBrowserViewTest, DISABLED_DrawAttention) {
   TestDrawAttention();
 }
 
 IN_PROC_BROWSER_TEST_F(PanelBrowserViewTest, ChangeAutoHideTaskBarThickness) {
   TestChangeAutoHideTaskBarThickness();
 }
 #endif