Made conversions from PassRefPtr to WebPrivatePtr move only.

third_party/WebKit/Source/web/WebUserGestureToken.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 29 matching lines @@
 
 void WebUserGestureToken::SetOutOfProcess() {
   token_->SetTimeoutPolicy(UserGestureToken::kOutOfProcess);
 }
 
 void WebUserGestureToken::SetJavascriptPrompt() {
   token_->SetTimeoutPolicy(UserGestureToken::kHasPaused);
 }
 
 WebUserGestureToken::WebUserGestureToken(PassRefPtr<UserGestureToken> token) {
-  token_ = token;
+  token_ = std::move(token);
 }
 
 WebUserGestureToken::operator PassRefPtr<UserGestureToken>() const {
   return token_.Get();
 }
 
 void WebUserGestureToken::Assign(const WebUserGestureToken& other) {
   token_ = other.token_;
 }
 
 void WebUserGestureToken::Reset() {
   token_.Reset();
 }
 
 }  // namespace blink