Enable the DesktopAuraTopLevelOwnedPopupResizeTest test for Linux AURA.

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/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 337 matching lines @@
   restored_bounds_ = restored_bounds;
   Maximize();
   Show();
 }
 
 bool DesktopWindowTreeHostX11::IsVisible() const {
   return window_mapped_;
 }
 
 void DesktopWindowTreeHostX11::SetSize(const gfx::Size& size) {
-  // TODO(erg):
-  NOTIMPLEMENTED();
+  bool size_changed = bounds_.size() != size;
+  XResizeWindow(xdisplay_, xwindow_, size.width(), size.height());
+  if (size_changed)
+    NotifyHostResized(size);
 }
 
 void DesktopWindowTreeHostX11::StackAtTop() {
   XRaiseWindow(xdisplay_, xwindow_);
 }
 
 void DesktopWindowTreeHostX11::CenterWindow(const gfx::Size& size) {
   gfx::Rect parent_bounds = GetWorkAreaBoundsInScreen();
 
   // If |window_|'s transient parent bounds are big enough to contain |size|,
@@ skipping 1173 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme();
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views