Replaced PassRefPtr copies with moves in Source/platform.

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 77 matching lines @@
 {
     DEFINE_STATIC_LOCAL(CalculationValueHandleMap, handleMap, ());
     return handleMap;
 }
 
 Length::Length(PassRefPtr<CalculationValue> calc)
     : m_quirk(false)
     , m_type(Calculated)
     , m_isFloat(false)
 {
-    m_intValue = calcHandles().insert(calc);
+    m_intValue = calcHandles().insert(std::move(calc));
 }
 
 Length Length::blendMixedTypes(const Length& from, double progress, ValueRange range) const
 {
     ASSERT(from.isSpecified());
     ASSERT(isSpecified());
     PixelsAndPercent fromPixelsAndPercent = from.getPixelsAndPercent();
     PixelsAndPercent toPixelsAndPercent = getPixelsAndPercent();
     const float pixels = blink::blend(fromPixelsAndPercent.pixels, toPixelsAndPercent.pixels, progress);
     const float percent = blink::blend(fromPixelsAndPercent.percent, toPixelsAndPercent.percent, progress);
@@ skipping 74 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