diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/chrome/common/env_vars.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/chrome/common/env_vars.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+// Copyright (c) 2006-2008 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/env_vars.h"
+
+namespace env_vars {
+
+// We call running in unattended mode (for automated testing) "headless".
+// This mode can be enabled using this variable or by the kNoErrorDialogs
+// switch.
+const wchar_t kHeadless[]        = L"CHROME_HEADLESS";
+
+// The name of the log file.
+const wchar_t kLogFileName[]     = L"CHROME_LOG_FILE";
+
+// CHROME_CRASHED exists if a previous instance of chrome has crashed. This
+// triggers the 'restart chrome' dialog. CHROME_RESTART contains the strings
+// that are needed to show the dialog.
+const wchar_t kShowRestart[] = L"CHROME_CRASHED";
+const wchar_t kRestartInfo[] = L"CHROME_RESTART";
+
+// The strings RIGHT_TO_LEFT and LEFT_TO_RIGHT indicate the locale direction.
+// For example, for Hebrew and Arabic locales, we use RIGHT_TO_LEFT so that the
+// dialog is displayed using the right orientation.
+const wchar_t kRtlLocale[] = L"RIGHT_TO_LEFT";
+const wchar_t kLtrLocale[] = L"LEFT_TO_RIGHT";
+
+// If the out-of-process breakpad could not be installed, we set this variable
+// according to the process.
+const wchar_t kNoOOBreakpad[] = L"NO_OO_BREAKPAD";
+
+}  // namespace env_vars