Update the remaining references to sys_string_conversions.h to its new location.

sandbox/win/src/process_policy_test.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 <memory>
 #include <string>
 
 #include "base/string16.h"
-#include "base/sys_string_conversions.h"
+#include "base/strings/sys_string_conversions.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/scoped_process_information.h"
 #include "base/win/windows_version.h"
 #include "sandbox/win/src/sandbox.h"
+#include "sandbox/win/src/sandbox_factory.h"
 #include "sandbox/win/src/sandbox_policy.h"
-#include "sandbox/win/src/sandbox_factory.h"
 #include "sandbox/win/tests/common/controller.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // While the shell API provides better calls than this home brew function
 // we use GetSystemWindowsDirectoryW which does not query the registry so
 // it is safe to use after revert.
 string16 MakeFullPathToSystem32(const wchar_t* name) {
   wchar_t windows_path[MAX_PATH] = {0};
@@ skipping 349 matching lines @@
   ASSERT_TRUE(!exe_path.empty());
   EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_PROCESS,
                              TargetPolicy::PROCESS_ALL_EXEC,
                              exe_path.c_str()));
 
   EXPECT_EQ(SBOX_TEST_SUCCEEDED,
             runner.RunTest(L"Process_GetChildProcessToken findstr.exe"));
 }
 
 }  // namespace sandbox