Remove a few chrome dependencies of c/b/webdata

chrome/browser/webdata/webdata_constants.h

Index: chrome/browser/webdata/webdata_constants.h
diff --git a/chrome/browser/webdata/webdata_constants.h b/chrome/browser/webdata/webdata_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..95f8b7dc2b1b3568e86ee316d9d8937034fab206
--- /dev/null
+++ b/chrome/browser/webdata/webdata_constants.h
@@ -0,0 +1,12 @@
+// Copyright 2013 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 CHROME_BROWSER_WEBDATA_WEBDATA_CONSTANTS_H_
+#define CHROME_BROWSER_WEBDATA_WEBDATA_CONSTANTS_H_
+
+#include "base/files/file_path.h"
+
+extern const base::FilePath::CharType kWebDataFilename[];
+
+#endif  // CHROME_BROWSER_WEBDATA_WEBDATA_CONSTANTS_H_