Add minimal support for process_utils on iOS

base/process_util_unittest_ios.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 "base/memory/scoped_ptr.h"
+#include "base/process_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(ProcessUtilTestIos, Memory) {
+  scoped_ptr<base::ProcessMetrics> process_metrics(
+      base::ProcessMetrics::CreateProcessMetrics(
+          base::GetCurrentProcessHandle()));
+
+  ASSERT_NE(0u, process_metrics->GetWorkingSetSize());
+}