Removed CRWSessionEntry from Tab's interface.

ios/web/navigation/crw_session_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/navigation/crw_session_controller.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 668 matching lines @@
   return [_entries objectAtIndex:index];
 }
 
 - (void)useDesktopUserAgentForNextPendingItem {
   if (_pendingEntry)
     [_pendingEntry navigationItem]->SetIsOverridingUserAgent(true);
   else
     _useDesktopUserAgentForNextPendingItem = YES;
 }
 
-- (NSInteger)indexOfItem:(web::NavigationItem*)item {
+- (NSInteger)indexOfItem:(const web::NavigationItem*)item {
   web::NavigationItemList items = self.items;
   for (NSInteger i = 0; i < static_cast<NSInteger>(items.size()); ++i) {
     if (items[i] == item)
       return i;
   }
   return NSNotFound;
 }
 
 #pragma mark -
 #pragma mark Private methods
@@ skipping 45 matching lines @@
 }
 
 - (web::NavigationItemList)itemListForEntryList:(NSArray*)entries {
   web::NavigationItemList list(entries.count);
   for (size_t index = 0; index < entries.count; ++index)
     list[index] = [entries[index] navigationItem];
   return list;
 }
 
 @end