Don't set app window WS_CAPTION style when running in ash mode.

chrome/browser/ui/views/apps/chrome_native_app_window_views_win.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_APPS_CHROME_NATIVE_APP_WINDOW_VIEWS_WIN_H_
 #define CHROME_BROWSER_UI_VIEWS_APPS_CHROME_NATIVE_APP_WINDOW_VIEWS_WIN_H_
 
 #include "chrome/browser/ui/views/apps/chrome_native_app_window_views.h"
 
 namespace web_app {
@@ skipping 12 matching lines @@
     return glass_frame_view_;
   };
 
  private:
   void ActivateParentDesktopIfNecessary();
 
   void OnShortcutInfoLoaded(
       const web_app::ShortcutInfo& shortcut_info);
 
   HWND GetNativeAppWindowHWND() const;
+  bool IsRunningInAsh();
   void EnsureCaptionStyleSet();
 
   // Overridden from ChromeNativeAppWindowViews:
   virtual void OnBeforeWidgetInit(views::Widget::InitParams* init_params,
                                   views::Widget* widget) OVERRIDE;
   virtual void InitializeDefaultWindow(
       const apps::AppWindow::CreateParams& create_params) OVERRIDE;
   virtual views::NonClientFrameView* CreateStandardDesktopAppFrame() OVERRIDE;
 
   // Overridden from ui::BaseWindow:
@@ skipping 11 matching lines @@
   // throughout the life of a window, e.g. if DWM is enabled and disabled.
   GlassAppWindowFrameViewWin* glass_frame_view_;
 
   // The Windows Application User Model ID identifying the app.
   base::string16 app_model_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeNativeAppWindowViewsWin);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_APPS_CHROME_NATIVE_APP_WINDOW_VIEWS_WIN_H_