Do V8 GC ASAP if system memory is pressured

chrome/browser/sessions/tab_loader.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/sessions/tab_loader.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/memory/memory_pressure_monitor.h"
@@ skipping 59 matching lines @@
                             const base::TimeTicks& restore_started) {
   if (!shared_tab_loader_)
     shared_tab_loader_ = new TabLoader(restore_started);
 
   shared_tab_loader_->stats_collector_->TrackTabs(tabs);
   shared_tab_loader_->StartLoading(tabs);
 }
 
 TabLoader::TabLoader(base::TimeTicks restore_started)
     : memory_pressure_listener_(
-          base::Bind(&TabLoader::OnMemoryPressure, base::Unretained(this))),
+          base::MemoryPressureListener::Create(base::Bind(
+              &TabLoader::OnMemoryPressure, base::Unretained(this)))),
       force_load_delay_multiplier_(1),
       loading_enabled_(true),
       restore_started_(restore_started) {
   stats_collector_ = new SessionRestoreStatsCollector(
       restore_started,
       make_scoped_ptr(
           new SessionRestoreStatsCollector::UmaStatsReportingDelegate()));
   shared_tab_loader_ = this;
   this_retainer_ = this;
 }
@@ skipping 176 matching lines @@
     // memory pressure.
     stats_collector_->DeferTab(tab);
   }
   // By calling |LoadNextTab| explicitly, we make sure that the
   // |NOTIFICATION_SESSION_RESTORE_DONE| event gets sent.
   LoadNextTab();
 }
 
 // static
 TabLoader* TabLoader::shared_tab_loader_ = nullptr;