PlzNavigate: identify same-page browser-initiated navigation.

net/base/url_util.cc

 // Copyright 2013 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 "net/base/url_util.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_POSIX)
 #include <netinet/in.h>
@@ skipping 353 matching lines @@
         return ip_address == IPAddress::IPv6Localhost();
 
       default:
         NOTREACHED();
     }
   }
 
   return false;
 }
 
+bool IsFragmentAddedOrUpdated(const GURL& old_url, const GURL& new_url) {
+  if (!new_url.has_ref() || old_url == new_url)
+    return false;
+
+  url::Replacements<char> replacements;
+  replacements.ClearRef();
+  return old_url.ReplaceComponents(replacements) ==
+         new_url.ReplaceComponents(replacements);
+}
+
 GURL SimplifyUrlForRequest(const GURL& url) {
   DCHECK(url.is_valid());
   // Fast path to avoid re-canonicalization via ReplaceComponents.
   if (!url.has_username() && !url.has_password() && !url.has_ref())
     return url;
   GURL::Replacements replacements;
   replacements.ClearUsername();
   replacements.ClearPassword();
   replacements.ClearRef();
   return url.ReplaceComponents(replacements);
@@ skipping 49 matching lines @@
   }
 
   if (is_local6)
     *is_local6 = false;
   return normalized_host == "localhost" ||
          normalized_host == "localhost.localdomain" ||
          IsNormalizedLocalhostTLD(normalized_host);
 }
 
 }  // namespace net