Remove a comment referencing tab contents type switching.

chrome/browser/tab_contents/navigation_controller.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_
 #define CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_
 
 #include <map>
 
 #include "build/build_config.h"
@@ skipping 187 matching lines @@
   // Commits the current pending entry and issues the NOTIFY_NAV_ENTRY_COMMIT
   // notification. No changes are made to the entry during this process, it is
   // just moved from pending to committed. This is an alternative to
   // RendererDidNavigate for simple TabContents types.
   //
   // When the pending entry is a new navigation, it will have a page ID of -1.
   // The caller should leave this as-is. CommitPendingEntry will generate a
   // new page ID for you and update the TabContents with that ID.
   void CommitPendingEntry();
 
-  // Discards the pending and transient entries if any.  Calling this may cause
-  // the active tab contents to switch if the current entry corresponds to a
-  // different tab contents type.
+  // Discards the pending and transient entries if any.
   void DiscardNonCommittedEntries();
 
   // Returns the pending entry corresponding to the navigation that is
   // currently in progress, or null if there is none.
   NavigationEntry* pending_entry() const {
     return pending_entry_;
   }
 
   // Returns the index of the pending entry or -1 if the pending entry
   // corresponds to a new navigation (created via LoadURL).
@@ skipping 276 matching lines @@
   // when testing.
   static bool check_for_repost_;
 
   // The maximum number of entries that a navigation controller can store.
   static size_t max_entry_count_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationController);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_