Remove OwnPtr::release() calls in core/ (part 3).

third_party/WebKit/Source/core/layout/LayoutGrid.cpp

Index: third_party/WebKit/Source/core/layout/LayoutGrid.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutGrid.cpp b/third_party/WebKit/Source/core/layout/LayoutGrid.cpp
index efda3881637b957a46a721d1a50d5fc864503497..b8997ea1cbf186b776cd88bbc555ec051524c8ce 100644
--- a/third_party/WebKit/Source/core/layout/LayoutGrid.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutGrid.cpp
@@ -212,7 +212,7 @@ public:
                 OwnPtr<GridArea> result = adoptPtr(new GridArea(GridSpan::translatedDefiniteGridSpan(m_rowIndex, m_rowIndex + rowSpan), GridSpan::translatedDefiniteGridSpan(m_columnIndex, m_columnIndex + columnSpan)));
                 // Advance the iterator to avoid an infinite loop where we would return the same grid area over and over.
                 ++varyingTrackIndex;
-                return result.release();
+                return result;
             }
         }
         return nullptr;
@@ -640,7 +640,7 @@ double LayoutGrid::computeFlexFactorUnitSize(const Vector<GridTrack>& tracks, Gr
         }
     }
     if (!validFlexFactorUnit)
-        return computeFlexFactorUnitSize(tracks, direction, flexFactorSum, leftOverSpace, flexibleTracksIndexes, additionalTracksToTreatAsInflexible.release());
+        return computeFlexFactorUnitSize(tracks, direction, flexFactorSum, leftOverSpace, flexibleTracksIndexes, std::move(additionalTracksToTreatAsInflexible));
     return hypotheticalFactorUnitSize;
 }