Revert of [blink] Unique pointers in Platform.h

content/renderer/media_capture_from_element/canvas_capture_handler.cc

 // Copyright 2015 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/renderer/media_capture_from_element/canvas_capture_handler.h"
 
 #include <utility>
 
 #include "base/base64.h"
 #include "base/bind_helpers.h"
@@ skipping 123 matching lines @@
   AddVideoCapturerSourceToVideoTrack(std::move(video_source), track);
 }
 
 CanvasCaptureHandler::~CanvasCaptureHandler() {
   DVLOG(3) << __func__;
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   io_task_runner_->DeleteSoon(FROM_HERE, delegate_.release());
 }
 
 // static
-std::unique_ptr<CanvasCaptureHandler>
-CanvasCaptureHandler::CreateCanvasCaptureHandler(
+CanvasCaptureHandler* CanvasCaptureHandler::CreateCanvasCaptureHandler(
     const blink::WebSize& size,
     double frame_rate,
     const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
     blink::WebMediaStreamTrack* track) {
   // Save histogram data so we can see how much CanvasCapture is used.
   // The histogram counts the number of calls to the JS API.
   UpdateWebRTCMethodCount(WEBKIT_CANVAS_CAPTURE_STREAM);
 
-  return std::unique_ptr<CanvasCaptureHandler>(
-      new CanvasCaptureHandler(size, frame_rate, io_task_runner, track));
+  return new CanvasCaptureHandler(size, frame_rate, io_task_runner, track);
 }
 
 void CanvasCaptureHandler::SendNewFrame(const SkImage* image) {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   CreateNewFrame(image);
 }
 
 bool CanvasCaptureHandler::NeedsNewFrame() const {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   return ask_for_new_frame_;
@@ skipping 100 matching lines @@
                            track_id, false);
   webkit_source.SetExtraData(media_stream_source.get());
 
   web_track->Initialize(webkit_source);
   web_track->SetTrackData(new MediaStreamVideoTrack(
       media_stream_source.release(),
       MediaStreamVideoSource::ConstraintsCallback(), true));
 }
 
 }  // namespace content