Use chrome::kChromeVersion in installer::GetModulePath().

chrome/common/chrome_constants_win_unittest.cc

Index: chrome/common/chrome_constants_win_unittest.cc
diff --git a/chrome/common/chrome_constants_win_unittest.cc b/chrome/common/chrome_constants_win_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0e5bd0f996b3f6714bd01f3670bf9d043ea755bc
--- /dev/null
+++ b/chrome/common/chrome_constants_win_unittest.cc
@@ -0,0 +1,32 @@
+// Copyright 2017 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/common/chrome_constants.h"
+
+#include <memory>
+
+#include "base/file_version_info.h"
+#include "base/files/file_path.h"
+#include "base/path_service.h"
+#include "base/strings/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chrome {
+
+// Verify that |kChromeVersion| is equal to the version in the VS_VERSION_INFO
+// resource of chrome.exe.
+TEST(ChromeConstants, ChromeVersion) {
+  base::FilePath current_exe_dir;
+  EXPECT_TRUE(base::PathService::Get(base::DIR_EXE, &current_exe_dir));
+  base::FilePath chrome_exe_path =
+      current_exe_dir.Append(chrome::kBrowserProcessExecutableName);
+
+  std::unique_ptr<FileVersionInfo> file_version_info(
+      FileVersionInfo::CreateFileVersionInfo(chrome_exe_path));
+  ASSERT_TRUE(file_version_info);
+  EXPECT_EQ(base::UTF16ToASCII(file_version_info->file_version()),
+            kChromeVersion);
+}
+
+}  // namespace chrome