Switch to standard integer types in chrome/browser/, part 3 of 4.

chrome/browser/private_working_set_snapshot_win_unittest.cc

 // Copyright 2015 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 "chrome/browser/private_working_set_snapshot.h"
 
+#include <stddef.h>
+
 #include "base/win/windows_version.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using PrivateWorkingSetSnapshotWinTest = testing::Test;
 
 TEST_F(PrivateWorkingSetSnapshotWinTest, FindPidSelfTest) {
   // The Pdh APIs are supported on Windows XP and above, but the "Working Set -
   // Private" counter that PrivateWorkingSetSnapshot depends on is not defined
   // until Windows Vista and is not reliable until Windows 7. Early-out to avoid
   // test failure.
@@ skipping 38 matching lines @@
   size_t private_ws2 = private_ws_snapshot.GetPrivateWorkingSet(pid);
   EXPECT_EQ(private_ws, private_ws2) << "GetPrivateWorkingSet should be "
                                         "consistent until the next call to "
                                         "Sample()";
 
   private_ws_snapshot.Sample();
   size_t private_ws3 = private_ws_snapshot.GetPrivateWorkingSet(pid);
   EXPECT_GT(private_ws3, private_ws2 + alloc_size / 2)
       << "GetPrivateWorkingSet should increase as we allocate more memory";
 }