Always use the native frame for popups and hosted apps on desktop linux

chrome/browser/ui/views/frame/browser_frame.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 "chrome/browser/ui/views/frame/browser_frame.h"
 
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
 #include "base/i18n/rtl.h"
@@ skipping 170 matching lines @@
 
 void BrowserFrame::UpdateThrobber(bool running) {
   browser_frame_view_->UpdateThrobber(running);
 }
 
 views::View* BrowserFrame::GetFrameView() const {
   return browser_frame_view_;
 }
 
 bool BrowserFrame::UseCustomFrame() const {
-  return use_custom_frame_pref_.GetValue();
+  return use_custom_frame_pref_.GetValue() &&
+      browser_view_->IsBrowserTypeNormal();
 }
 
 bool BrowserFrame::ShouldSaveWindowPlacement() const {
   return native_browser_frame_->ShouldSaveWindowPlacement();
 }
 
 void BrowserFrame::GetWindowPlacement(gfx::Rect* bounds,
                                       ui::WindowShowState* show_state) const {
   return native_browser_frame_->GetWindowPlacement(bounds, show_state);
 }
@@ skipping 107 matching lines @@
 bool BrowserFrame::ShouldLeaveOffsetNearTopBorder() {
   return !IsMaximized();
 }
 
 void BrowserFrame::OnUseCustomChromeFrameChanged() {
   // Tell the window manager to add or remove system borders.
   set_frame_type(UseCustomFrame() ? Widget::FRAME_TYPE_FORCE_CUSTOM
                                   : Widget::FRAME_TYPE_FORCE_NATIVE);
   FrameTypeChanged();
 }