Remove screen capturers from media/video/capture/screen.

media/video/capture/screen/win/scoped_thread_desktop.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 "media/video/capture/screen/win/scoped_thread_desktop.h"
-
-#include "base/logging.h"
-
-#include "media/video/capture/screen/win/desktop.h"
-
-namespace media {
-
-ScopedThreadDesktop::ScopedThreadDesktop()
-    : initial_(Desktop::GetThreadDesktop()) {
-}
-
-ScopedThreadDesktop::~ScopedThreadDesktop() {
-  Revert();
-}
-
-bool ScopedThreadDesktop::IsSame(const Desktop& desktop) {
-  if (assigned_.get() != NULL) {
-    return assigned_->IsSame(desktop);
-  } else {
-    return initial_->IsSame(desktop);
-  }
-}
-
-void ScopedThreadDesktop::Revert() {
-  if (assigned_.get() != NULL) {
-    initial_->SetThreadDesktop();
-    assigned_.reset();
-  }
-}
-
-bool ScopedThreadDesktop::SetThreadDesktop(scoped_ptr<Desktop> desktop) {
-  Revert();
-
-  if (initial_->IsSame(*desktop))
-    return true;
-
-  if (!desktop->SetThreadDesktop())
-    return false;
-
-  assigned_ = desktop.Pass();
-  return true;
-}
-
-}  // namespace media