Use SameDocument instead of SamePage term on iOS.

ios/web/web_state/ui/crw_web_controller.mm

 // Copyright 2012 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/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 1292 matching lines @@
   return web::Referrer(GURL(base::SysNSStringToUTF8(referrerString)),
                        web::ReferrerPolicyAlways);
 }
 
 - (void)pushStateWithPageURL:(const GURL&)pageURL
                  stateObject:(NSString*)stateObject
                   transition:(ui::PageTransition)transition {
   [[self sessionController] pushNewItemWithURL:pageURL
                                    stateObject:stateObject
                                     transition:transition];
-  _webStateImpl->OnSamePageNavigation(pageURL);
+  _webStateImpl->OnSameDocumentNavigation(pageURL);
   self.userInteractionRegistered = NO;
 }
 
 - (void)replaceStateWithPageURL:(const GURL&)pageURL
                     stateObject:(NSString*)stateObject {
   [[self sessionController] updateCurrentItemWithURL:pageURL
                                          stateObject:stateObject];
-  _webStateImpl->OnSamePageNavigation(pageURL);
+  _webStateImpl->OnSameDocumentNavigation(pageURL);
 }
 
 - (void)setDocumentURL:(const GURL&)newURL {
   if (newURL != _documentURL && newURL.is_valid()) {
     _documentURL = newURL;
     _interactionRegisteredSinceLastURLChange = NO;
   }
 }
 
 - (void)setNavigationItemTitle:(NSString*)title {
@@ skipping 3393 matching lines @@
 
   if (!navigationWasCommitted && ![_pendingNavigationInfo cancelled]) {
     // A fast back/forward within the same origin does not call
     // |didCommitNavigation:|, so signal page change explicitly.
     DCHECK_EQ(_documentURL.GetOrigin(), webViewURL.GetOrigin());
     BOOL isSameDocumentNavigation =
         [self isKVOChangePotentialSameDocumentNavigationToURL:webViewURL];
     [self setDocumentURL:webViewURL];
     [self webPageChanged];
     if (isSameDocumentNavigation) {
-      _webStateImpl->OnSamePageNavigation(webViewURL);
+      _webStateImpl->OnSameDocumentNavigation(webViewURL);
     } else {
       _webStateImpl->OnNavigationCommitted(webViewURL);
     }
   }
 
   [self updateSSLStatusForCurrentNavigationItem];
 
   // Fast back forward navigation may not call |didFinishNavigation:|, so
   // signal did finish navigation explicitly.
   if (_lastRegisteredRequestURL == _documentURL) {
@@ skipping 135 matching lines @@
     // If this wasn't a previously-expected load (e.g., certain back/forward
     // navigations), register the load request.
     if (![self isLoadRequestPendingForURL:newURL])
       [self registerLoadRequest:newURL];
   }
 
   [self setDocumentURL:newURL];
 
   if (!_changingHistoryState) {
     [self didStartLoadingURL:_documentURL];
-    _webStateImpl->OnSamePageNavigation(newURL);
+    _webStateImpl->OnSameDocumentNavigation(newURL);
     [self updateSSLStatusForCurrentNavigationItem];
     [self didFinishNavigation];
   }
 }
 
 - (BOOL)isLoadRequestPendingForURL:(const GURL&)targetURL {
   if (self.loadPhase != web::LOAD_REQUESTED)
     return NO;
 
   web::NavigationItem* pendingItem =
@@ skipping 169 matching lines @@
 - (void)simulateLoadRequestWithURL:(const GURL&)URL {
   _lastRegisteredRequestURL = URL;
   _loadPhase = web::LOAD_REQUESTED;
 }
 
 - (NSString*)referrerFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:kReferrerHeaderName];
 }
 
 @end