linux_aura: Three fixes for switching themes.

ui/views/widget/desktop_aura/desktop_root_window_host_x11.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_root_window_host_x11.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
@@ skipping 601 matching lines @@
 void DesktopRootWindowHostX11::SetVisibilityChangedAnimationsEnabled(
     bool value) {
   // Much like the previous NativeWidgetGtk, we don't have anything to do here.
 }
 
 bool DesktopRootWindowHostX11::ShouldUseNativeFrame() {
   return false;
 }
 
 void DesktopRootWindowHostX11::FrameTypeChanged() {
+  // Replace the frame and layout the contents. Even though we don't have a
+  // swapable glass frame like on Windows, we still replace the frame because
+  // the button assets don't update otherwise.
+  native_widget_delegate_->AsWidget()->non_client_view()->UpdateFrame(true);
 }
 
 NonClientFrameView* DesktopRootWindowHostX11::CreateNonClientFrameView() {
   return NULL;
 }
 
 void DesktopRootWindowHostX11::SetFullscreen(bool fullscreen) {
   SetWMSpecState(fullscreen,
                  atom_cache_.GetAtom("_NET_WM_STATE_FULLSCREEN"),
                  None);
@@ skipping 561 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostX11(native_widget_delegate,
                                         desktop_native_widget_aura,
                                         initial_bounds);
 }
 
 }  // namespace views