Move ui/base/x/x11_error_tracker to base/x11.

ui/base/x/x11_error_tracker.cc

-// Copyright (c) 2013 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/base/x/x11_error_tracker.h"
-
-#include "ui/base/x/x11_util.h"
-
-namespace {
-
-unsigned char g_x11_error_code = 0;
-
-int X11ErrorHandler(XDisplay* display, XErrorEvent* error) {
-  g_x11_error_code = error->error_code;
-  return 0;
-}
-
-}
-
-namespace ui {
-
-X11ErrorTracker::X11ErrorTracker() {
-  old_handler_ = XSetErrorHandler(X11ErrorHandler);
-}
-
-X11ErrorTracker::~X11ErrorTracker() {
-  XSetErrorHandler(old_handler_);
-}
-
-bool X11ErrorTracker::FoundNewError() {
-  XSync(gfx::GetXDisplay(), False);
-  unsigned char error = g_x11_error_code;
-  g_x11_error_code = 0;
-  return error != 0;
-}
-
-}  // namespace ui