[Offline Pages] Make new archives have random file names.

chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h

Index: chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h
diff --git a/chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h b/chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h
index 9dedbdd11b3ccd74991814c81e1cdd5ed11c30ab..e1c78430d360acddb004d69b58201bf8c080137b 100644
--- a/chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h
+++ b/chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h
@@ -42,13 +42,6 @@ namespace offline_pages {
 //   }
 class OfflinePageMHTMLArchiver : public OfflinePageArchiver {
  public:
-  // Returns the extension name of the offline page file.
-  static std::string GetFileNameExtension();
-  // Creates a file name for the archive file based on url and title. Public for
-  // testing.
-  static base::FilePath GenerateFileName(const GURL& url,
-                                         const std::string& title,
-                                         int64_t archive_id);
 
   explicit OfflinePageMHTMLArchiver(content::WebContents* web_contents);
   ~OfflinePageMHTMLArchiver() override;