Revert of Delete video_render module.

webrtc/modules/video_render/ios/video_render_ios_channel.mm

Index: webrtc/modules/video_render/ios/video_render_ios_channel.mm
diff --git a/webrtc/modules/video_render/ios/video_render_ios_channel.mm b/webrtc/modules/video_render/ios/video_render_ios_channel.mm
new file mode 100644
index 0000000000000000000000000000000000000000..b2b15857f9317645f422233da545417e76bd9ede
--- /dev/null
+++ b/webrtc/modules/video_render/ios/video_render_ios_channel.mm
@@ -0,0 +1,61 @@
+/*
+ *  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.
+ */
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#include "webrtc/modules/video_render/ios/video_render_ios_channel.h"
+
+using namespace webrtc;
+
+VideoRenderIosChannel::VideoRenderIosChannel(VideoRenderIosView* view)
+    : view_(view), current_frame_(new VideoFrame()), buffer_is_updated_(false) {
+}
+
+VideoRenderIosChannel::~VideoRenderIosChannel() { delete current_frame_; }
+
+int32_t VideoRenderIosChannel::RenderFrame(const uint32_t stream_id,
+                                           const VideoFrame& video_frame) {
+  current_frame_->CopyFrame(video_frame);
+  current_frame_->set_render_time_ms(0);
+  buffer_is_updated_ = true;
+
+  return 0;
+}
+
+bool VideoRenderIosChannel::RenderOffScreenBuffer() {
+  if (![view_ renderFrame:current_frame_]) {
+    return false;
+  }
+
+  buffer_is_updated_ = false;
+
+  return true;
+}
+
+bool VideoRenderIosChannel::IsUpdated() { return buffer_is_updated_; }
+
+int VideoRenderIosChannel::SetStreamSettings(const float z_order,
+                                             const float left,
+                                             const float top,
+                                             const float right,
+                                             const float bottom) {
+  if (![view_ setCoordinatesForZOrder:z_order
+                                 Left:left
+                                  Top:bottom
+                                Right:right
+                               Bottom:top]) {
+
+    return -1;
+  }
+
+  return 0;
+}