Replaced PassRefPtr copies with moves.

third_party/WebKit/Source/platform/Length.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller ( mueller@kde.org )
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 31 matching lines @@
 
     int insert(PassRefPtr<CalculationValue> calcValue)
     {
         ASSERT(m_index);
         // FIXME calc(): https://bugs.webkit.org/show_bug.cgi?id=80489
         // This monotonically increasing handle generation scheme is potentially wasteful
         // of the handle space. Consider reusing empty handles.
         while (m_map.contains(m_index))
             m_index++;
 
-        m_map.set(m_index, calcValue);
+        m_map.set(m_index, std::move(calcValue));
 
         return m_index;
     }
 
     void remove(int index)
     {
         ASSERT(m_map.contains(index));
         m_map.remove(index);
     }
 
@@ skipping 120 matching lines @@
     return isCalculated() && (&getCalculationValue() == &o.getCalculationValue() || getCalculationValue() == o.getCalculationValue());
 }
 
 struct SameSizeAsLength {
     int32_t value;
     int32_t metaData;
 };
 static_assert(sizeof(Length) == sizeof(SameSizeAsLength), "length should stay small");
 
 } // namespace blink