Last_n: do not save snapshot of custom tabs.

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/guid.h"
 #include "base/location.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 140 matching lines @@
 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
+bool OfflinePageUtils::CurrentlyShownInCustomTab(
+    content::WebContents* web_contents) {
+  TabAndroid* tab_android = TabAndroid::FromWebContents(web_contents);
+  DCHECK(tab_android);
+  return tab_android && tab_android->IsCurrentlyACustomTab();
+}
+
+// static
 void OfflinePageUtils::CheckExistenceOfPagesWithURL(
     content::BrowserContext* browser_context,
     const std::string name_space,
     const GURL& offline_page_url,
     const PagesExistCallback& callback) {
   OfflinePageModel* offline_page_model =
       OfflinePageModelFactory::GetForBrowserContext(browser_context);
   DCHECK(offline_page_model);
   auto continuation = [](
       const std::string& name_space,
@@ skipping 85 matching lines @@
 GURL OfflinePageUtils::GetOriginalURLFromWebContents(
     content::WebContents* web_contents) {
   content::NavigationEntry* entry =
       web_contents->GetController().GetLastCommittedEntry();
   if (!entry || entry->GetRedirectChain().size() <= 1)
     return GURL();
   return entry->GetRedirectChain().front();
 }
 
 }  // namespace offline_pages