Linux Aura: Hide title bar when CustomFrameView maximized on Unity.

ui/views/views_delegate.h

 // 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.
 
 #ifndef UI_VIEWS_VIEWS_DELEGATE_H_
 #define UI_VIEWS_VIEWS_DELEGATE_H_
 
 #include <string>
 
 #if defined(OS_WIN)
@@ skipping 101 matching lines @@
       content::BrowserContext* browser_context,
       content::SiteInstance* site_instance) = 0;
 
   // Gives the platform a chance to modify the properties of a Widget.
   virtual void OnBeforeWidgetInit(Widget::InitParams* params,
                                   internal::NativeWidgetDelegate* delegate) = 0;
 
   // Returns the default obscured text reveal duration.
   virtual base::TimeDelta GetDefaultTextfieldObscuredRevealDuration() = 0;
 
+  // Returns true if the operating system's window manager will always provide a
+  // title bar with caption buttons (ignoring the setting to
+  // |remove_standard_frame| in InitParams). If |maximized|, this applies to
+  // maximized windows; otherwise to restored windows.
+  virtual bool WindowManagerProvidesTitleBar(bool maximized);
+
  private:
   scoped_ptr<ViewsTouchSelectionControllerFactory> views_tsc_factory_;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEWS_DELEGATE_H_