Made conversions from PassRefPtr to WebPrivatePtr move only.

third_party/WebKit/Source/platform/exported/WebCryptoResult.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 65 matching lines @@
     impl_->CompleteWithKeyPair(public_key, private_key);
   Reset();
 }
 
 bool WebCryptoResult::Cancelled() const {
   return cancel_->Cancelled();
 }
 
 WebCryptoResult::WebCryptoResult(CryptoResult* impl,
                                  PassRefPtr<CryptoResultCancel> cancel)
-    : impl_(impl), cancel_(cancel) {
+    : impl_(impl), cancel_(std::move(cancel)) {
   DCHECK(impl_.Get());
   DCHECK(cancel_.Get());
 }
 
 void WebCryptoResult::Reset() {
   impl_.Reset();
   cancel_.Reset();
 }
 
 void WebCryptoResult::Assign(const WebCryptoResult& o) {
   impl_ = o.impl_;
   cancel_ = o.cancel_;
 }
 
 }  // namespace blink