Replaced PassRefPtr copies with moves in Source/core.

third_party/WebKit/Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 712 matching lines @@
     // See https://bugs.webkit.org/show_bug.cgi?id=31838
     if (m_frame->document()->loadEventFinished())
         client()->didStartLoading(NavigationWithinSameDocument);
 
     HistoryCommitType historyCommitType = loadTypeToCommitType(type);
     if (!m_currentItem)
         historyCommitType = HistoryInertCommit;
 
     setHistoryItemStateForCommit(type, historyCommitType, sameDocumentNavigationSource == SameDocumentNavigationHistoryApi ? HistoryNavigationType::HistoryApi : HistoryNavigationType::Fragment);
     if (sameDocumentNavigationSource == SameDocumentNavigationHistoryApi) {
-        m_currentItem->setStateObject(data);
+        m_currentItem->setStateObject(std::move(data));
         m_currentItem->setScrollRestorationType(scrollRestorationType);
     }
     client()->dispatchDidNavigateWithinPage(m_currentItem.get(), historyCommitType, !!initiatingDocument);
     client()->dispatchDidReceiveTitle(m_frame->document()->title());
     if (m_frame->document()->loadEventFinished())
         client()->didStopLoading();
 }
 
 void FrameLoader::detachDocumentLoader(Member<DocumentLoader>& loader)
 {
@@ skipping 24 matching lines @@
         m_frame->eventHandler().stopAutoscroll();
         m_frame->localDOMWindow()->enqueueHashchangeEvent(oldURL, url);
     }
     m_documentLoader->setIsClientRedirect(clientRedirect == ClientRedirectPolicy::ClientRedirect);
     updateForSameDocumentNavigation(url, SameDocumentNavigationDefault, nullptr, ScrollRestorationAuto, frameLoadType, initiatingDocument);
 
     m_documentLoader->initialScrollState().wasScrolledByUser = false;
 
     checkCompleted();
 
-    m_frame->localDOMWindow()->statePopped(stateObject ? stateObject : SerializedScriptValue::nullValue());
+    m_frame->localDOMWindow()->statePopped(stateObject ? std::move(stateObject) : SerializedScriptValue::nullValue());
 
     if (historyLoadType == HistorySameDocumentLoad)
         restoreScrollPositionAndViewState();
 
     // We need to scroll to the fragment whether or not a hash change occurred, since
     // the user might have scrolled since the previous navigation.
     processFragment(url, NavigationWithinSameDocument);
     takeObjectSnapshot();
 }
 
@@ skipping 827 matching lines @@
     tracedValue->setString("documentLoaderURL", m_documentLoader ? m_documentLoader->url() : String());
     return tracedValue;
 }
 
 inline void FrameLoader::takeObjectSnapshot() const
 {
     TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID("loading", "FrameLoader", this, toTracedValue());
 }
 
 } // namespace blink