Linux Aura: Use system title bar is now set by preference, not flag.

ui/views/widget/desktop_aura/desktop_native_widget_aura.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/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 510 matching lines @@
 }
 
 NonClientFrameView* DesktopNativeWidgetAura::CreateNonClientFrameView() {
   return desktop_root_window_host_->CreateNonClientFrameView();
 }
 
 bool DesktopNativeWidgetAura::ShouldUseNativeFrame() const {
   return desktop_root_window_host_->ShouldUseNativeFrame();
 }
 
-void DesktopNativeWidgetAura::FrameTypeChanged() {
-  desktop_root_window_host_->FrameTypeChanged();
+void DesktopNativeWidgetAura::FrameTypeChanged(Widget::FrameType new_type) {
+  desktop_root_window_host_->FrameTypeChanged(new_type);
   UpdateWindowTransparency();
 }
 
 Widget* DesktopNativeWidgetAura::GetWidget() {
   return native_widget_delegate_->AsWidget();
 }
 
 const Widget* DesktopNativeWidgetAura::GetWidget() const {
   return native_widget_delegate_->AsWidget();
 }
@@ skipping 617 matching lines @@
   bool transparent = false;
 #if defined(OS_WIN)
   // On Windows, a native frame implies Glass, so the window should be
   // transparent.
   transparent = ShouldUseNativeFrame();
 #endif
   content_window_->SetTransparent(transparent);
 }
 
 }  // namespace views