Replaced PassRefPtr copies with moves in Source/core.

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

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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 130 matching lines @@
 LayoutText::LayoutText(Node* node, PassRefPtr<StringImpl> str)
     : LayoutObject(!node || node->isDocumentNode() ? 0 : node)
     , m_hasTab(false)
     , m_linesDirty(false)
     , m_containsReversedText(false)
     , m_knownToHaveNoOverflowAndNoFallbackFonts(false)
     , m_minWidth(-1)
     , m_maxWidth(-1)
     , m_firstLineMinWidth(0)
     , m_lastLineLineMinWidth(0)
-    , m_text(str)
+    , m_text(std::move(str))
     , m_firstTextBox(nullptr)
     , m_lastTextBox(nullptr)
 {
     ASSERT(m_text);
     // FIXME: Some clients of LayoutText (and subclasses) pass Document as node to create anonymous layoutObject.
     // They should be switched to passing null and using setDocumentForAnonymous.
     if (node && node->isDocumentNode())
         setDocumentForAnonymous(toDocument(node));
 
     m_canUseSimpleFontCodePath = computeCanUseSimpleFontCodePath();
@@ skipping 1176 matching lines @@
             curr->setLineBreakPos(clampTo<int>(curr->lineBreakPos() + delta));
     }
 
     // If the text node is empty, dirty the line where new text will be inserted.
     if (!firstTextBox() && parent()) {
         parent()->dirtyLinesFromChangedChild(this);
         dirtiedLines = true;
     }
 
     m_linesDirty = dirtiedLines;
-    setText(text, force || dirtiedLines);
+    setText(std::move(text), force || dirtiedLines);
 }
 
 void LayoutText::transformText()
 {
     if (RefPtr<StringImpl> textToTransform = originalText())
         setText(textToTransform.release(), true);
 }
 
 static inline bool isInlineFlowOrEmptyText(const LayoutObject* o)
 {
@@ skipping 41 matching lines @@
         break;
     case LOWERCASE:
         text = text.lower(style->locale());
         break;
     }
 }
 
 void LayoutText::setTextInternal(PassRefPtr<StringImpl> text)
 {
     ASSERT(text);
-    m_text = text;
+    m_text = std::move(text);
 
     if (style()) {
         applyTextTransform(style(), m_text, previousCharacter());
 
         // We use the same characters here as for list markers.
         // See the listMarkerText function in LayoutListMarker.cpp.
         switch (style()->textSecurity()) {
         case TSNONE:
             break;
         case TSCIRCLE:
@@ skipping 35 matching lines @@
     }
 }
 
 void LayoutText::setText(PassRefPtr<StringImpl> text, bool force)
 {
     ASSERT(text);
 
     if (!force && equal(m_text.impl(), text.get()))
         return;
 
-    setTextInternal(text);
+    setTextInternal(std::move(text));
     // If preferredLogicalWidthsDirty() of an orphan child is true, LayoutObjectChildList::
     // insertChildNode() fails to set true to owner. To avoid that, we call
     // setNeedsLayoutAndPrefWidthsRecalc() only if this LayoutText has parent.
     if (parent())
         setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::TextChanged);
     m_knownToHaveNoOverflowAndNoFallbackFonts = false;
 
     if (AXObjectCache* cache = document().existingAXObjectCache())
         cache->textChanged(this);
 }
@@ skipping 280 matching lines @@
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         paintInvalidator.invalidateDisplayItemClient(*box, invalidationReason);
         if (box->truncation() != cNoTruncation) {
             if (EllipsisBox* ellipsisBox = box->root().ellipsisBox())
                 paintInvalidator.invalidateDisplayItemClient(*ellipsisBox, invalidationReason);
         }
     }
 }
 
 } // namespace blink