Revert of Showing previews UI for Offline Previews

chrome/browser/android/offline_pages/offline_page_utils.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/android/offline_pages/offline_page_utils.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
@@ skipping 91 matching lines @@
 
 // static
 const OfflinePageHeader* OfflinePageUtils::GetOfflineHeaderFromWebContents(
     content::WebContents* web_contents) {
   OfflinePageTabHelper* tab_helper =
       OfflinePageTabHelper::FromWebContents(web_contents);
   return tab_helper ? &(tab_helper->offline_header()) : nullptr;
 }
 
 // static
-bool OfflinePageUtils::IsShowingOfflinePreview(
-    content::WebContents* web_contents) {
-  OfflinePageTabHelper* tab_helper =
-      OfflinePageTabHelper::FromWebContents(web_contents);
-  return tab_helper && tab_helper->IsShowingOfflinePreview();
-}
-
-// static
 bool OfflinePageUtils::GetTabId(content::WebContents* web_contents,
                                 int* tab_id) {
   TabAndroid* tab_android = TabAndroid::FromWebContents(web_contents);
   if (!tab_android)
     return false;
   *tab_id = tab_android->GetAndroidId();
   return true;
 }
 
 // static
@@ skipping 55 matching lines @@
   GURL::Replacements remove_params;
   remove_params.ClearRef();
 
   GURL lhs_stripped = lhs.ReplaceComponents(remove_params);
   GURL rhs_stripped = lhs.ReplaceComponents(remove_params);
 
   return lhs_stripped == rhs_stripped;
 }
 
 }  // namespace offline_pages