Remove unused notification kTabModelUserNavigatedNavigation.

ios/chrome/browser/tabs/tab.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/chrome/browser/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 210 matching lines @@
 
   base::scoped_nsobject<OpenInController> openInController_;
   base::WeakNSProtocol<id<PassKitDialogProvider>> passKitDialogProvider_;
   // TODO(crbug.com/546213): Move this out of Tab, probably to native app
   // launcher since that's the only thing that uses it.
   base::WeakNSProtocol<id<StoreKitLauncher>> storeKitLauncher_;
 
   // Whether or not this tab is currently being displayed.
   BOOL visible_;
 
-  // Used between -webWillStartLoadingURL: and -webDidStartLoadingURL:.
-  BOOL isUserNavigationEvent_;
-
   // Holds entries that need to be added to the history DB.  Prerender tabs do
   // not write navigation data to the history DB.  Instead, they cache history
   // data in this vector and add it to the DB when the prerender status is
   // removed (when the Tab is swapped in as a real Tab).
   std::vector<history::HistoryAddPageArgs> addPageVector_;
 
   // YES if this Tab is being prerendered.
   BOOL isPrerenderTab_;
 
   // YES if this Tab was initiated from a voice search.
@@ skipping 1423 matching lines @@
 // Ensure there is nothing here that could be a risk to the user beyond mild
 // confusion in that event (e.g. progress bar starting unexpectedly).
 - (void)webWillAddPendingURL:(const GURL&)url
                   transition:(ui::PageTransition)transition {
   DCHECK(self.webController.loadPhase == web::LOAD_REQUESTED);
   DCHECK([self navigationManager]);
 
   // Move the toolbar to visible during page load.
   [fullScreenController_ disableFullScreen];
 
-  isUserNavigationEvent_ =
+  BOOL isUserNavigationEvent =
       (transition & ui::PAGE_TRANSITION_IS_REDIRECT_MASK) == 0;
   // Check for link-follow clobbers. These are changes where there is no
   // pending entry (since that means the change wasn't caused by this class),
   // and where the URL changes (to avoid counting page resurrection).
   // TODO(crbug.com/546401): Consider moving this into NavigationManager, or
   // into a NavigationManager observer callback, so it doesn't need to be
   // checked in several places.
-  if (isUserNavigationEvent_ && !isPrerenderTab_ &&
+  if (isUserNavigationEvent && !isPrerenderTab_ &&
       ![self navigationManager]->GetPendingItem() && url != self.url) {
     base::RecordAction(UserMetricsAction("MobileTabClobbered"));
     if ([parentTabModel_ tabUsageRecorder])
       [parentTabModel_ tabUsageRecorder]->RecordPageLoadStart(self);
   }
   if (![self navigationManager]->GetPendingItem()) {
     // Reset |isVoiceSearchResultsTab| since a new page is being navigated to.
     self.isVoiceSearchResultsTab = NO;
   }
 }
@@ skipping 17 matching lines @@
 - (void)webState:(web::WebState*)webState
     didCommitNavigationWithDetails:(const web::LoadCommittedDetails&)details {
   DCHECK([self navigationManager]);
   // |webWillAddPendingURL:transition:| is not called for native page loads.
   // TODO(crbug.com/381201): Move this call there once that bug is fixed so that
   // |disableFullScreen| is called only from one place.
   [fullScreenController_ disableFullScreen];
   GURL lastCommittedURL = webState->GetLastCommittedURL();
   [autoReloadBridge_ loadStartedForURL:lastCommittedURL];
 
-  if (isUserNavigationEvent_) {
-    [[NSNotificationCenter defaultCenter]
-        postNotificationName:kTabModelUserNavigatedNotification
-                      object:self];
-  }
   if (parentTabModel_) {
     [[NSNotificationCenter defaultCenter]
         postNotificationName:kTabModelTabWillStartLoadingNotification
                       object:parentTabModel_
                     userInfo:@{kTabModelTabKey : self}];
   }
   favicon::FaviconDriver* faviconDriver =
       favicon::WebFaviconDriver::FromWebState(webState);
   if (faviconDriver) {
     faviconDriver->FetchFavicon(lastCommittedURL);
@@ skipping 513 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end