[Offline pages]: Move logic for whether to consider the DocumentAvailableInMainFrame signal to the …

chrome/browser/android/offline_pages/recent_tab_helper.cc

 // Copyright (c) 2016 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/recent_tab_helper.h"
 
 #include <queue>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 145 matching lines @@
   SaveSnapshotForDownloads(false);
 }
 
 // Initialize lazily. It needs TabAndroid for initialization, which is also a
 // TabHelper - so can't initialize in constructor because of uncertain order
 // of creation of TabHelpers.
 bool RecentTabHelper::EnsureInitialized() {
   if (snapshot_controller_)  // Initialized already.
     return snapshots_enabled_;
 
-  snapshot_controller_.reset(
-      new SnapshotController(base::ThreadTaskRunnerHandle::Get(), this));
+  snapshot_controller_ = SnapshotController::CreateForForegroundOfflining(
+      base::ThreadTaskRunnerHandle::Get(), this);
   snapshot_controller_->Stop();  // It is reset when navigation commits.
 
   int tab_id_number = 0;
   tab_id_.clear();
 
   if (delegate_->GetTabId(web_contents(), &tab_id_number))
     tab_id_ = base::IntToString(tab_id_number);
 
   // TODO(dimich): When we have BackgroundOffliner, avoid capturing prerenderer
   // WebContents with its origin as well.
@@ skipping 326 matching lines @@
   DVLOG_IF(1, downloads_ongoing_snapshot_info_)
       << " - Canceling ongoing downloads snapshot";
   weak_ptr_factory_.InvalidateWeakPtrs();
   downloads_ongoing_snapshot_info_.reset();
   downloads_latest_saved_snapshot_info_.reset();
   last_n_ongoing_snapshot_info_.reset();
   last_n_latest_saved_snapshot_info_.reset();
 }
 
 }  // namespace offline_pages