Use std::unique_ptr to signal ownership transfer in WebCompositorSupport

third_party/WebKit/Source/core/paint/VideoPainterTest.cpp

 // Copyright 2016 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 "core/paint/VideoPainter.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/loader/EmptyClients.h"
@@ skipping 17 matching lines @@
   StubWebMediaPlayer(WebMediaPlayerClient* client) : m_client(client) {}
 
   const WebLayer* getWebLayer() { return m_webLayer.get(); }
 
   // WebMediaPlayer
   void load(LoadType, const WebMediaPlayerSource&, CORSMode) {
     m_networkState = NetworkStateLoaded;
     m_client->networkStateChanged();
     m_readyState = ReadyStateHaveEnoughData;
     m_client->readyStateChanged();
-    m_webLayer =
-        wrapUnique(Platform::current()->compositorSupport()->createLayer());
+    m_webLayer = Platform::current()->compositorSupport()->createLayer();
     m_client->setWebLayer(m_webLayer.get());
   }
   void play() override {}
   void pause() override {}
   bool supportsSave() const override { return false; }
   void seek(double seconds) override {}
   void setRate(double) override {}
   void setVolume(double) override {}
   WebTimeRanges buffered() const override { return WebTimeRanges(); }
   WebTimeRanges seekable() const override { return WebTimeRanges(); }
@@ skipping 89 matching lines @@
   StubWebMediaPlayer* player =
       static_cast<StubWebMediaPlayer*>(element->webMediaPlayer());
   const WebLayer* layer = player->getWebLayer();
   ASSERT_TRUE(layer);
   EXPECT_TRUE(hasLayerAttached(*layer));
   EXPECT_EQ(WebSize(300, 200), layer->bounds());
 }
 
 }  // namespace
 }  // namespace blink