Do V8 GC ASAP if system memory is pressured

chrome/browser/chromeos/resource_reporter/resource_reporter.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/chromeos/resource_reporter/resource_reporter.h"
 
 #include <cstdint>
 #include <queue>
 #include <utility>
 
@@ skipping 95 matching lines @@
 }
 
 void ResourceReporter::StartMonitoring() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   if (is_monitoring_)
     return;
 
   is_monitoring_ = true;
   task_management::TaskManagerInterface::GetTaskManager()->AddObserver(this);
-  memory_pressure_listener_.reset(new base::MemoryPressureListener(
+  memory_pressure_listener_.reset(base::MemoryPressureListener::Create(
       base::Bind(&ResourceReporter::OnMemoryPressure, base::Unretained(this))));
 }
 
 void ResourceReporter::StopMonitoring() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   if (!is_monitoring_)
     return;
 
   is_monitoring_ = false;
@@ skipping 296 matching lines @@
           kRapporUsageRangeFlagsField,
           GET_ENUM_VAL(GetMemoryUsageRange(sampled_memory_task->memory_bytes)),
           GET_ENUM_VAL(MemoryUsageRange::NUM_RANGES));
       rappor_service->RecordSampleObj(kMemoryRapporMetric,
                                       std::move(memory_sample));
     }
   }
 }
 
 }  // namespace chromeos