Introduce new files ios/chrome/common/chrome_constants.{cc,h}.

ios/chrome/browser/chrome_constants.h

Index: ios/chrome/browser/chrome_constants.h
diff --git a/ios/chrome/browser/chrome_constants.h b/ios/chrome/browser/chrome_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..c2c97041bdd7c0f4594783d168321a08b63542fd
--- /dev/null
+++ b/ios/chrome/browser/chrome_constants.h
@@ -0,0 +1,22 @@
+// 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.
+
+#ifndef IOS_CHROME_BROWSER_CHROME_CONSTANTS_H_
+#define IOS_CHROME_BROWSER_CHROME_CONSTANTS_H_
+
+// A handful of resource-like constants related to the Chrome application.
+
+#include "base/files/file_path.h"
+
+extern const char kIOSChromeInitialBrowserState[];
+extern const char kIOSChromeMultiBrowserStatePrefix[];
+
+extern const base::FilePath::CharType kIOSChromeCacheDirname[];
+extern const base::FilePath::CharType kIOSChromeChannelIDFilename[];
+extern const base::FilePath::CharType kIOSChromeCookieFilename[];
+extern const base::FilePath::CharType kIOSChromeCRLSetFilename[];
+extern const base::FilePath::CharType
+    kIOSChromeNetworkPersistentStateFilename[];
+
+#endif  // IOS_CHROME_BROWSER_CHROME_CONSTANTS_H_