Upstream Chrome on iOS source code [1/11].

ios/chrome/app/memory_monitor.mm

Index: ios/chrome/app/memory_monitor.mm
diff --git a/ios/chrome/app/memory_monitor.mm b/ios/chrome/app/memory_monitor.mm
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+// Copyright 2014 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.
+
+#import "ios/chrome/app/memory_monitor.h"
+
+#include <dispatch/dispatch.h>
+#import <Foundation/NSPathUtilities.h>
+
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/location.h"
+#include "base/logging.h"
+#import "base/mac/foundation_util.h"
+#include "base/strings/sys_string_conversions.h"
+#include "base/sys_info.h"
+#import "ios/chrome/browser/crash_report/breakpad_helper.h"
+#include "ios/web/public/web_thread.h"
+
+namespace ios_internal {
+
+void AsynchronousFreeMemoryMonitor() {
+  UpdateBreakpadMemoryValues();
+  web::WebThread::PostDelayedTask(
+      web::WebThread::FILE, FROM_HERE,
+      base::Bind(&ios_internal::AsynchronousFreeMemoryMonitor),
+      base::TimeDelta::FromSeconds(30));
+}
+
+void UpdateBreakpadMemoryValues() {
+  int freeMemory =
+      static_cast<int>(base::SysInfo::AmountOfAvailablePhysicalMemory() / 1024);
+  breakpad_helper::SetCurrentFreeMemoryInKB(freeMemory);
+  NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
+                                                       NSUserDomainMask, YES);
+  NSString* value = base::mac::ObjCCastStrict<NSString>([paths lastObject]);
+  base::FilePath filePath = base::FilePath(base::SysNSStringToUTF8(value));
+  int freeDiskSpace =
+      static_cast<int>(base::SysInfo::AmountOfFreeDiskSpace(filePath) / 1024);
+  breakpad_helper::SetCurrentFreeDiskInKB(freeDiskSpace);
+}
+}