Remove usage of Tab's |url| property for BookmarkInteractionController.

ios/chrome/browser/ui/bookmarks/bookmark_interaction_controller.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/chrome/browser/ui/bookmarks/bookmark_interaction_controller.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/mac/bind_objc_block.h"
@@ skipping 132 matching lines @@
 - (void)dealloc {
   _bookmarkBrowser.delegate = nil;
   _bookmarkEditor.delegate = nil;
 }
 
 - (void)addBookmarkForTab:(Tab*)tab {
   base::RecordAction(base::UserMetricsAction("BookmarkAdded"));
   const BookmarkNode* defaultFolder =
       [[self class] folderForNewBookmarksInBrowserState:_browserState];
   self.bookmarkModel->AddURL(defaultFolder, defaultFolder->child_count(),
-                             base::SysNSStringToUTF16(tab.title), tab.url);
+                             base::SysNSStringToUTF16(tab.title),
+                             tab.lastCommittedURL);

[Eugene But (OOO till 7-30), 2017/04/14 21:06:24]

I checked that Desktop adds bookmark for lastCommittedURL.

 
   MDCSnackbarMessageAction* action = [[MDCSnackbarMessageAction alloc] init];
   __weak BookmarkInteractionController* weakSelf = self;
   __weak Tab* weakTab = tab;
   action.handler = ^{
     BookmarkInteractionController* strongSelf = weakSelf;
     if (!strongSelf || !weakTab)
       return;
     [strongSelf presentBookmarkForTab:weakTab];
   };
@@ skipping 13 matching lines @@
   message.action = action;
   message.category = bookmark_utils_ios::kBookmarksSnackbarCategory;
   [MDCSnackbarManager showMessage:message];
 }
 
 - (void)presentBookmarkForTab:(Tab*)tab {
   DCHECK(!self.bookmarkBrowser && !self.bookmarkEditor);
   DCHECK(tab);
 
   const BookmarkNode* bookmark =
-      self.bookmarkModel->GetMostRecentlyAddedUserNodeForURL(tab.url);
+      self.bookmarkModel->GetMostRecentlyAddedUserNodeForURL(
+          tab.lastCommittedURL);
   if (!bookmark)
     return;
 
   [self dismissSnackbar];
 
   BookmarkEditViewController* bookmarkEditor =
       [[BookmarkEditViewController alloc] initWithBookmark:bookmark
                                               browserState:_browserState];
   self.bookmarkEditor = bookmarkEditor;
   self.bookmarkEditor.delegate = self;
@@ skipping 99 matching lines @@
     } else {
       [_loader loadURL:url
                    referrer:web::Referrer()
                  transition:ui::PAGE_TRANSITION_AUTO_BOOKMARK
           rendererInitiated:NO];
     }
   }
 }
 
 @end