Do V8 GC ASAP if system memory is pressured

chrome/browser/memory/tab_manager.cc

 // Copyright (c) 2012 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/memory/tab_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 188 matching lines @@
   }
   if (!recent_tab_discard_timer_.IsRunning()) {
     recent_tab_discard_timer_.Start(
         FROM_HERE, TimeDelta::FromSeconds(kRecentTabDiscardIntervalSeconds),
         this, &TabManager::RecordRecentTabDiscard);
   }
   start_time_ = NowTicks();
   // Create a |MemoryPressureListener| to listen for memory events.
   base::MemoryPressureMonitor* monitor = base::MemoryPressureMonitor::Get();
   if (monitor) {
-    memory_pressure_listener_.reset(new base::MemoryPressureListener(
+    memory_pressure_listener_.reset(base::MemoryPressureListener::Create(
         base::Bind(&TabManager::OnMemoryPressure, base::Unretained(this))));
     base::MemoryPressureListener::MemoryPressureLevel level =
         monitor->GetCurrentPressureLevel();
     if (level == base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL) {
       OnMemoryPressure(level);
     }
   }
 }
 
 void TabManager::Stop() {
@@ skipping 620 matching lines @@
     }
   } else {
     // The code here can only be tested under a full browser test.
     AddTabStats(&stats_list);
   }
 
   return stats_list;
 }
 
 }  // namespace memory