Revert of Modify ScreenCaptureFrameQueue into a template

webrtc/modules/desktop_capture/screen_capture_frame_queue.cc

+/*
+ *  Copyright (c) 2013 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_capture_frame_queue.h"
+
+#include <assert.h>
+#include <algorithm>
+
+#include "webrtc/modules/desktop_capture/desktop_frame.h"
+#include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
+#include "webrtc/system_wrappers/include/logging.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+ScreenCaptureFrameQueue::ScreenCaptureFrameQueue() : current_(0) {}
+
+ScreenCaptureFrameQueue::~ScreenCaptureFrameQueue() {}
+
+void ScreenCaptureFrameQueue::MoveToNextFrame() {
+  current_ = (current_ + 1) % kQueueLength;
+
+  // Verify that the frame is not shared, i.e. that consumer has released it
+  // before attempting to capture again.
+  assert(!frames_[current_].get() || !frames_[current_]->IsShared());
+}
+
+void ScreenCaptureFrameQueue::ReplaceCurrentFrame(DesktopFrame* frame) {
+  frames_[current_].reset(SharedDesktopFrame::Wrap(frame));
+}
+
+void ScreenCaptureFrameQueue::Reset() {
+  for (int i = 0; i < kQueueLength; ++i)
+    frames_[i].reset();
+}
+
+}  // namespace webrtc