Allow a unique origin to compare equal to itself

url/origin.cc

 // Copyright 2015 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 "url/origin.h"
 
 #include <stdint.h>
 #include <string.h>
 
 #include "base/logging.h"
@@ skipping 142 matching lines @@
 
   GURL tuple_url(tuple_.GetURL());
 
   if (!suborigin_.empty())
     return AddSuboriginToUrl(tuple_url, suborigin_);
 
   return tuple_url;
 }
 
 bool Origin::IsSameOriginWith(const Origin& other) const {
+  if (this == &other)
+    return true;
+
   if (opaque_ || other.opaque_)
     return false;
 
   return tuple_.Equals(other.tuple_) && suborigin_ == other.suborigin_;
 }
 
 bool Origin::IsSamePhysicalOriginWith(const Origin& other) const {
   return GetPhysicalOrigin().IsSameOriginWith(other.GetPhysicalOrigin());
 }
 
@@ skipping 12 matching lines @@
 
 bool IsSameOriginWith(const GURL& a, const GURL& b) {
   return Origin(a).IsSameOriginWith(Origin(b));
 }
 
 bool IsSamePhysicalOriginWith(const GURL& a, const GURL& b) {
   return Origin(a).IsSamePhysicalOriginWith(Origin(b));
 }
 
 }  // namespace url