Remove OwnPtr::release() calls in core/ (part 4).

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.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 "core/paint/PaintPropertyTreeBuilder.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutPart.h"
 #include "core/layout/LayoutView.h"
@@ skipping 195 matching lines @@
     // This condition may be loosened with no adverse effects beside memory use.
     if (!object.hasLayer())
         return;
 
     OwnPtr<ObjectPaintProperties::LocalBorderBoxProperties> borderBoxContext =
         adoptPtr(new ObjectPaintProperties::LocalBorderBoxProperties);
     borderBoxContext->paintOffset = context.paintOffset;
     borderBoxContext->transform = context.currentTransform;
     borderBoxContext->clip = context.currentClip;
     borderBoxContext->effect = context.currentEffect;
-    object.ensureObjectPaintProperties().setLocalBorderBoxProperties(borderBoxContext.release());
+    object.ensureObjectPaintProperties().setLocalBorderBoxProperties(std::move(borderBoxContext));
 }
 
 // TODO(trchen): Remove this once we bake the paint offset into frameRect.
 void PaintPropertyTreeBuilder::updateScrollbarPaintOffset(LayoutObject& object, const PaintPropertyTreeBuilderContext& context)
 {
     IntPoint roundedPaintOffset = roundedIntPoint(context.paintOffset);
     if (roundedPaintOffset == IntPoint())
         return;
 
     if (!object.isBoxModelObject())
@@ skipping 209 matching lines @@
 
     if (object.isLayoutPart()) {
         Widget* widget = toLayoutPart(object).widget();
         if (widget && widget->isFrameView())
             walk(*toFrameView(widget), localContext);
         // TODO(pdr): Investigate RemoteFrameView (crbug.com/579281).
     }
 }
 
 } // namespace blink