Replaced PassRefPtr copies with moves in Source/core.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1479 matching lines @@
     // Quotes are also LayoutInline, so we need to create an inherited style to avoid
     // getting an inline with positioning or an invalid display.
     //
     if (isImage() || isQuote()) {
         RefPtr<ComputedStyle> style = ComputedStyle::create();
         style->inheritFrom(*pseudoStyle);
         setStyle(style.release());
         return;
     }
 
-    setStyle(pseudoStyle);
+    setStyle(std::move(pseudoStyle));
 }
 
 void LayoutObject::firstLineStyleDidChange(const ComputedStyle& oldStyle, const ComputedStyle& newStyle)
 {
     StyleDifference diff = oldStyle.visualInvalidationDiff(newStyle);
 
     if (diff.needsPaintInvalidation() || diff.textDecorationOrColorChanged()) {
         // We need to invalidate all inline boxes in the first line, because they need to be
         // repainted with the new style, e.g. background, font style, etc.
         LayoutBlockFlow* firstLineContainer = nullptr;
@@ skipping 49 matching lines @@
 
     StyleDifference diff;
     if (m_style)
         diff = m_style->visualInvalidationDiff(*style);
 
     diff = adjustStyleDifference(diff);
 
     styleWillChange(diff, *style);
 
     RefPtr<ComputedStyle> oldStyle = m_style.release();
-    setStyleInternal(style);
+    setStyleInternal(std::move(style));
 
     updateFillImages(oldStyle ? &oldStyle->backgroundLayers() : 0, m_style->backgroundLayers());
     updateFillImages(oldStyle ? &oldStyle->maskLayers() : 0, m_style->maskLayers());
 
     updateImage(oldStyle ? oldStyle->borderImage().image() : 0, m_style->borderImage().image());
     updateImage(oldStyle ? oldStyle->maskBoxImage().image() : 0, m_style->maskBoxImage().image());
 
     StyleImage* newContentImage = m_style->contentData() && m_style->contentData()->isImage() ?
         toImageContentData(m_style->contentData())->image() : nullptr;
     StyleImage* oldContentImage = oldStyle && oldStyle->contentData() && oldStyle->contentData()->isImage() ?
@@ skipping 196 matching lines @@
         updateAnonymousChildStyle(*child, *newStyle);
 
         child->setStyle(newStyle.release());
     }
 }
 
 void LayoutObject::setStyleWithWritingModeOf(PassRefPtr<ComputedStyle> style, LayoutObject* parent)
 {
     if (parent)
         style->setWritingMode(parent->styleRef().getWritingMode());
-    setStyle(style);
+    setStyle(std::move(style));
 }
 
 void LayoutObject::setStyleWithWritingModeOfParent(PassRefPtr<ComputedStyle> style)
 {
-    setStyleWithWritingModeOf(style, parent());
+    setStyleWithWritingModeOf(std::move(style), parent());
 }
 
 void LayoutObject::addChildWithWritingModeOfParent(LayoutObject* newChild, LayoutObject* beforeChild)
 {
     if (newChild->mutableStyleRef().setWritingMode(styleRef().getWritingMode())
         && newChild->isBoxModelObject()) {
         newChild->setHorizontalWritingMode(isHorizontalWritingMode());
     }
     addChild(newChild, beforeChild);
 }
@@ skipping 1430 matching lines @@
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
     } else {
         WTFLogAlways("%s", "Cannot showLayoutTree. Root is (nil)");
     }
 }
 
 #endif