Test X11 header pollution

content/common/gpu/media/avda_surface_tracker.cc

-// Copyright 2016 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 "content/common/gpu/media/avda_surface_tracker.h"
-
-#include "base/callback.h"
-#include "base/lazy_instance.h"
-#include "base/threading/thread_checker.h"
-
-namespace content {
-
-namespace {
-static base::LazyInstance<AVDASurfaceTracker> g_lazy_instance =
-    LAZY_INSTANCE_INITIALIZER;
-}
-
-AVDASurfaceTracker::AVDASurfaceTracker() {}
-
-AVDASurfaceTracker::~AVDASurfaceTracker() {}
-
-void AVDASurfaceTracker::RegisterOnDestroyingSurfaceCallback(
-    const OnDestroyingSurfaceCallback& cb) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  callbacks_.push_back(cb);
-}
-
-void AVDASurfaceTracker::UnregisterOnDestroyingSurfaceCallback(
-    const OnDestroyingSurfaceCallback& cb) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  for (auto it = callbacks_.begin(); it != callbacks_.end(); ++it) {
-    if (it->Equals(cb)) {
-      callbacks_.erase(it);
-      return;
-    }
-  }
-}
-
-void AVDASurfaceTracker::NotifyDestroyingSurface(int surface_id) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  for (const auto& cb : callbacks_)
-    cb.Run(surface_id);
-}
-
-AVDASurfaceTracker* AVDASurfaceTracker::GetInstance() {
-  return g_lazy_instance.Pointer();
-}
-
-}  // namespace content