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..36aff7ec29c4560e5f7cb1d8376401d55b754969 100644
--- a/chrome/common/chrome_constants.cc
+++ b/chrome/common/chrome_constants.cc
@@ -178,8 +178,10 @@ 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 kDeprecatedProtectedPreferencesFilename[] =
     FPL("Protected Preferences");
+const base::FilePath::CharType kSecurePreferencesFilename[] =
+    FPL("Secure Preferences");
 const base::FilePath::CharType kReadmeFilename[] = FPL("README");
 const base::FilePath::CharType kResetPromptMementoFilename[] =
     FPL("Reset Prompt Memento");