Minor cleanup to how infobars handle expiry:

chrome/browser/api/infobars/infobar_delegate.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_API_INFOBARS_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_API_INFOBARS_INFOBAR_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "webkit/glue/window_open_disposition.h"
@@ skipping 96 matching lines @@
       AsRegisterProtocolHandlerInfoBarDelegate();
   virtual ThemeInstalledInfoBarDelegate* AsThemePreviewInfobarDelegate();
   virtual ThreeDAPIInfoBarDelegate* AsThreeDAPIInfoBarDelegate();
   virtual TranslateInfoBarDelegate* AsTranslateInfoBarDelegate();
 
  protected:
   // If |contents| is non-NULL, its active entry's unique ID will be stored
   // using StoreActiveEntryUniqueID automatically.
   explicit InfoBarDelegate(InfoBarService* infobar_service);
 
-  // Store the unique id for the active entry in the specified WebContents, to
-  // be used later upon navigation to determine if this InfoBarDelegate should
-  // be expired from |contents_|.
-  void StoreActiveEntryUniqueID(InfoBarService* infobar_service);
+  // Store the unique id for the active entry in our WebContents, to be used
+  // later upon navigation to determine if this InfoBarDelegate should be
+  // expired.
+  void StoreActiveEntryUniqueID();
 
-  // Direct accessors for subclasses that need to do something special.
   int contents_unique_id() const { return contents_unique_id_; }
-  void set_contents_unique_id(int contents_unique_id) {
-    contents_unique_id_ = contents_unique_id;
-  }
 
   // Returns true if the navigation is to a new URL or a reload occured.
   virtual bool ShouldExpireInternal(
       const content::LoadCommittedDetails& details) const;
 
   // Removes ourself from |owner_| if we haven't already been removed.
   // TODO(pkasting): Move to InfoBar.
   void RemoveSelf();
 
  private:
   // The unique id of the active NavigationEntry of the WebContents that we were
   // opened for. Used to help expire on navigations.
   int contents_unique_id_;
 
   // TODO(pkasting): Remove.
   InfoBarService* owner_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_API_INFOBARS_INFOBAR_DELEGATE_H_