Expand the JsonPrefStore's interface to allow for an alternate filename to be specified.

chrome/common/chrome_constants.cc

Index: chrome/common/chrome_constants.cc
diff --git a/chrome/common/chrome_constants.cc b/chrome/common/chrome_constants.cc
index 839495fafbf047111b38261054957a9553ec61dd..37a00f8a5d86465a225dfe6fb8364e77c9ffadc5 100644
--- a/chrome/common/chrome_constants.cc
+++ b/chrome/common/chrome_constants.cc
@@ -178,13 +178,15 @@ const base::FilePath::CharType kNewTabThumbnailsFilename[] =
     FPL("Top Thumbnails");
 const base::FilePath::CharType kOBCertFilename[] = FPL("Origin Bound Certs");
 const base::FilePath::CharType kPreferencesFilename[] = FPL("Preferences");
-const base::FilePath::CharType kProtectedPreferencesFilename[] =
+const base::FilePath::CharType kProtectedPreferencesFilenameDeprecated[] =
     FPL("Protected Preferences");
 const base::FilePath::CharType kReadmeFilename[] = FPL("README");
 const base::FilePath::CharType kResetPromptMementoFilename[] =
     FPL("Reset Prompt Memento");
 const base::FilePath::CharType kSafeBrowsingBaseFilename[] =
     FPL("Safe Browsing");
+const base::FilePath::CharType kSecurePreferencesFilename[] =
+    FPL("Secure Preferences");
 const base::FilePath::CharType kServiceStateFileName[] = FPL("Service State");
 const base::FilePath::CharType kShortcutsDatabaseName[] = FPL("Shortcuts");
 const base::FilePath::CharType kSingletonCookieFilename[] =