Revert of [blink] Unique pointers in Platform.h

third_party/WebKit/Source/modules/mediacapturefromelement/HTMLCanvasElementCapture.cpp

 // 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 "modules/mediacapturefromelement/HTMLCanvasElementCapture.h"
 
 #include <memory>
 #include "core/dom/ExceptionCode.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.h"
@@ skipping 37 matching lines @@
     double frame_rate,
     ExceptionState& exception_state) {
   if (!element.OriginClean()) {
     exception_state.ThrowSecurityError("Canvas is not origin-clean.");
     return nullptr;
   }
 
   WebMediaStreamTrack track;
   const WebSize size(element.width(), element.height());
   std::unique_ptr<WebCanvasCaptureHandler> handler;
-  if (given_frame_rate) {
-    handler = Platform::Current()->CreateCanvasCaptureHandler(size, frame_rate,
-                                                              &track);
-  } else {
-    handler = Platform::Current()->CreateCanvasCaptureHandler(
-        size, kDefaultFrameRate, &track);
-  }
+  if (given_frame_rate)
+    handler = WTF::WrapUnique(Platform::Current()->CreateCanvasCaptureHandler(
+        size, frame_rate, &track));
+  else
+    handler = WTF::WrapUnique(Platform::Current()->CreateCanvasCaptureHandler(
+        size, kDefaultFrameRate, &track));
 
   if (!handler) {
     exception_state.ThrowDOMException(
         kNotSupportedError, "No CanvasCapture handler can be created.");
     return nullptr;
   }
 
   CanvasCaptureMediaStreamTrack* canvas_track;
   if (given_frame_rate)
     canvas_track = CanvasCaptureMediaStreamTrack::Create(
         track, &element, std::move(handler), frame_rate);
   else
     canvas_track = CanvasCaptureMediaStreamTrack::Create(track, &element,
                                                          std::move(handler));
   // We want to capture a frame in the beginning.
   canvas_track->requestFrame();
 
   MediaStreamTrackVector tracks;
   tracks.push_back(canvas_track);
   return MediaStream::Create(element.GetExecutionContext(), tracks);
 }
 
 }  // namespace blink