Revert of Add DesktopCapturer GetSourceList SelectSource FocusOnSelectedSource functions

webrtc/modules/desktop_capture/screen_capturer.cc

-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/modules/desktop_capture/screen_capturer.h"
-
-#include <memory>
-#include <utility>
-
-namespace webrtc {
-
-ScreenCapturer::~ScreenCapturer() = default;
-
-bool ScreenCapturer::GetScreenList(ScreenList* screens) {
-  SourceList sources;
-  if (!GetSourceList(&sources)) {
-    return false;
-  }
-
-  for (const Source& source : sources) {
-    screens->push_back({source.id});
-  }
-  return true;
-}
-
-bool ScreenCapturer::SelectScreen(ScreenId id) {
-  return SelectSource(id);
-}
-
-bool ScreenCapturer::GetSourceList(SourceList* sources) {
-  ScreenList screens;
-  if (!GetScreenList(&screens)) {
-    return false;
-  }
-
-  for (const Screen& screen : screens) {
-    sources->push_back({screen.id});
-  }
-
-  return true;
-}
-
-bool ScreenCapturer::SelectSource(SourceId id) {
-  return SelectScreen(id);
-}
-
-}  // namespace webrtc