Replaced PassRefPtr copies with moves in Source/core.

third_party/WebKit/Source/core/frame/DOMWindow.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/DOMWindow.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/SecurityContext.h"
@@ skipping 209 matching lines @@
 
     String sourceOrigin = (hasSuborigin && securityOrigin->suborigin()->policyContains(unsafeSendOpt)) ? securityOrigin->toPhysicalOriginString() : securityOrigin->toString();
     String sourceSuborigin = hasSuborigin ? securityOrigin->suborigin()->name() : String();
 
     KURL targetUrl = isLocalDOMWindow() ? document()->url() : KURL(KURL(), frame()->securityContext()->getSecurityOrigin()->toString());
     if (MixedContentChecker::isMixedContent(sourceDocument->getSecurityOrigin(), targetUrl))
         UseCounter::count(frame(), UseCounter::PostMessageFromSecureToInsecure);
     else if (MixedContentChecker::isMixedContent(frame()->securityContext()->getSecurityOrigin(), sourceDocument->url()))
         UseCounter::count(frame(), UseCounter::PostMessageFromInsecureToSecure);
 
-    MessageEvent* event = MessageEvent::create(std::move(channels), message, sourceOrigin, String(), source, sourceSuborigin);
+    MessageEvent* event = MessageEvent::create(std::move(channels), std::move(message), sourceOrigin, String(), source, sourceSuborigin);
 
     schedulePostMessage(event, std::move(target), sourceDocument);
 }
 
 // FIXME: Once we're throwing exceptions for cross-origin access violations, we will always sanitize the target
 // frame details, so we can safely combine 'crossDomainAccessErrorMessage' with this method after considering
 // exactly which details may be exposed to JavaScript.
 //
 // http://crbug.com/17325
 String DOMWindow::sanitizedCrossDomainAccessErrorMessage(const LocalDOMWindow* callingWindow) const
@@ skipping 134 matching lines @@
     page->focusController().focusDocumentView(frame(), true /* notifyEmbedder */);
 }
 
 DEFINE_TRACE(DOMWindow)
 {
     visitor->trace(m_location);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink