[chrome_elf] Big ELF cleanup. Part 1.

chrome_elf/hook_util/test/hook_util_test_dll.cc

+// Copyright 2016 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_elf/hook_util/test/hook_util_test_dll.h"
+
+namespace {
+
+DWORD g_export_call_count = 0;
+
+}  // namespace
+
+extern "C" __declspec(dllexport) void ExportedApi() {
+  g_export_call_count++;
+}
+
+extern "C" __declspec(dllexport) DWORD ExportedApiCallCount() {
+  return g_export_call_count;
+}
+
+BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) {
+  return TRUE;
+}