Extract unit tests from the mixed bag process_util_unittest.cc into proper files.

base/process/process_util_unittest_ios.cc

Index: base/process/process_util_unittest_ios.cc
diff --git a/base/process/process_util_unittest_ios.cc b/base/process/process_util_unittest_ios.cc
deleted file mode 100644
index cad0f1b09f0b24ebe70c61866dcfa3cf8f073549..0000000000000000000000000000000000000000
--- a/base/process/process_util_unittest_ios.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// 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/process_metrics.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());
-}