[Offline pages] Removes the functionality to get bookmark ID from offline URL

chrome/browser/android/offline_pages/offline_page_utils.h

Index: chrome/browser/android/offline_pages/offline_page_utils.h
diff --git a/chrome/browser/android/offline_pages/offline_page_utils.h b/chrome/browser/android/offline_pages/offline_page_utils.h
index a70c970758dfa8cdbf4399e650b64fa618e2b06e..75c342ab55f39432cbe3d0cad774d37c79d6871d 100644
--- a/chrome/browser/android/offline_pages/offline_page_utils.h
+++ b/chrome/browser/android/offline_pages/offline_page_utils.h
@@ -31,11 +31,6 @@ class OfflinePageUtils {
       content::BrowserContext* browser_context,
       const GURL& offline_url);
 
-  // Gets a bookmark ID related to the |offline_url|.
-  static int64_t GetBookmarkIdForOfflineURL(
-      content::BrowserContext* browser_context,
-      const GURL& offline_url);
-
   // Checks whether |offline_url| points to an offline page.
   static bool IsOfflinePage(content::BrowserContext* browser_context,
                             const GURL& offline_url);