Do V8 GC ASAP if system memory is pressured

components/browser_sync/browser/profile_sync_service.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 "components/browser_sync/browser/profile_sync_service.h"
 
 #include <stddef.h>
 #include <cstddef>
 #include <map>
 #include <utility>
@@ skipping 358 matching lines @@
   }
 #endif
 
 #if !defined(OS_ANDROID)
   DCHECK(sync_error_controller_ == NULL)
       << "Initialize() called more than once.";
   sync_error_controller_.reset(new SyncErrorController(this));
   AddObserver(sync_error_controller_.get());
 #endif
 
-  memory_pressure_listener_.reset(new base::MemoryPressureListener(base::Bind(
-      &ProfileSyncService::OnMemoryPressure, weak_factory_.GetWeakPtr())));
+  memory_pressure_listener_.reset(base::MemoryPressureListener::Create(
+      base::Bind(&ProfileSyncService::OnMemoryPressure,
+          weak_factory_.GetWeakPtr())));
   startup_controller_->Reset(GetRegisteredDataTypes());
   startup_controller_->TryStart();
 }
 
 void ProfileSyncService::TrySyncDatatypePrefRecovery() {
   DCHECK(!IsBackendInitialized());
   if (!IsFirstSetupComplete())
     return;
 
   // There was a bug where OnUserChoseDatatypes was not properly called on
@@ skipping 2135 matching lines @@
 }
 
 std::string ProfileSyncService::unrecoverable_error_message() const {
   return unrecoverable_error_message_;
 }
 
 tracked_objects::Location ProfileSyncService::unrecoverable_error_location()
     const {
   return unrecoverable_error_location_;
 }