PlzNavigate: identify same-page browser-initiated navigation.

ios/web/navigation/navigation_manager_impl.mm

 // 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.
 
 #import "ios/web/navigation/navigation_manager_impl.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/logging.h"
 #import "ios/web/navigation/crw_session_controller+private_constructors.h"
 #import "ios/web/navigation/crw_session_controller.h"
 #import "ios/web/navigation/crw_session_entry.h"
 #import "ios/web/navigation/navigation_item_impl.h"
 #import "ios/web/navigation/navigation_manager_delegate.h"
 #include "ios/web/navigation/navigation_manager_facade_delegate.h"
 #include "ios/web/public/load_committed_details.h"
 #import "ios/web/public/navigation_item.h"
 #import "ios/web/public/web_state/web_state.h"
+#include "net/base/url_util.h"
 #include "ui/base/page_transition_types.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
-namespace {
-
-// Checks whether or not two URL are an in-page navigation (differing only
-// in the fragment).
-bool AreURLsInPageNavigation(const GURL& existing_url, const GURL& new_url) {
-  if (existing_url == new_url || !new_url.has_ref())
-    return false;
-
-  url::Replacements<char> replacements;
-  replacements.ClearRef();
-  return existing_url.ReplaceComponents(replacements) ==
-         new_url.ReplaceComponents(replacements);
-}
-
-}  // anonymous namespace
-
 namespace web {
 
 NavigationManager::WebLoadParams::WebLoadParams(const GURL& url)
     : url(url),
       transition_type(ui::PAGE_TRANSITION_LINK),
       is_renderer_initiated(false),
       post_data(nil) {}
 
 NavigationManager::WebLoadParams::~WebLoadParams() {}
 
@@ skipping 86 matching lines @@
 
 void NavigationManagerImpl::OnNavigationItemCommitted() {
   LoadCommittedDetails details;
   details.item = GetLastCommittedItem();
   DCHECK(details.item);
   details.previous_item_index = [session_controller_ previousNavigationIndex];
   if (details.previous_item_index >= 0) {
     DCHECK([session_controller_ previousEntry]);
     details.previous_url =
         [session_controller_ previousEntry].navigationItem->GetURL();
-    details.is_in_page =
-        AreURLsInPageNavigation(details.previous_url, details.item->GetURL());
+    details.is_in_page = net::IsFragmentAddedOrUpdated(details.previous_url,
+                                                       details.item->GetURL());
   } else {
     details.previous_url = GURL();
     details.is_in_page = NO;
   }
 
   delegate_->OnNavigationItemCommitted(details);
 
   if (facade_delegate_) {
     facade_delegate_->OnNavigationItemCommitted(details.previous_item_index,
                                                 details.is_in_page);
@@ skipping 236 matching lines @@
 }
 
 bool NavigationManagerImpl::IsRedirectItemAtIndex(int index) const {
   DCHECK_GT(index, 0);
   DCHECK_LT(index, GetItemCount());
   ui::PageTransition transition = GetItemAtIndex(index)->GetTransitionType();
   return transition & ui::PAGE_TRANSITION_IS_REDIRECT_MASK;
 }
 
 }  // namespace web