Estimate renderer memory usage in MacOS via working set size instead of page file size.

webkit/glue/webkitplatformsupport_impl.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 "webkit/glue/webkitplatformsupport_impl.h"
 
 #if defined(OS_LINUX)
 #include <malloc.h>
 #endif
 
@@ skipping 627 matching lines @@
 
 #if defined(OS_MACOSX)
 static size_t memoryUsageMBMac() {
   using base::ProcessMetrics;
   static ProcessMetrics* process_metrics =
       // The default port provider is sufficient to get data for the current
       // process.
       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
                                            NULL);
   DCHECK(process_metrics);
-  return process_metrics->GetPagefileUsage() >> 20;
+  return process_metrics->GetWorkingSetSize() >> 20;
 }
 #endif
 
 #if !defined(OS_LINUX) && !defined(OS_MACOSX)
 static size_t memoryUsageMBGeneric() {
   using base::ProcessMetrics;
   static ProcessMetrics* process_metrics =
       ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle());
   DCHECK(process_metrics);
   return process_metrics->GetPagefileUsage() >> 20;
@@ skipping 52 matching lines @@
   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
 }
 
 void WebKitPlatformSupportImpl::didStopWorkerRunLoop(
     const WebKit::WebWorkerRunLoop& runLoop) {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
 }
 
 }  // namespace webkit_glue