Made conversions from PassRefPtr to WebPrivatePtr move only.

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

 /*
  * Copyright (C) 2010 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 158 matching lines @@
 
 double WebURLLoadTiming::PushEnd() const {
   return private_->PushEnd();
 }
 
 void WebURLLoadTiming::SetPushEnd(double end) {
   private_->SetPushEnd(end);
 }
 
 WebURLLoadTiming::WebURLLoadTiming(PassRefPtr<ResourceLoadTiming> value)
-    : private_(value) {}
+    : private_(std::move(value)) {}
 
 WebURLLoadTiming& WebURLLoadTiming::operator=(
     PassRefPtr<ResourceLoadTiming> value) {
-  private_ = value;
+  private_ = std::move(value);
   return *this;
 }
 
 WebURLLoadTiming::operator PassRefPtr<ResourceLoadTiming>() const {
   return private_.Get();
 }
 
 }  // namespace blink