Chromium side changes to add the ledger API.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 5a09394442609215608c272e5342155f6bb76af1..8395a22a530cfe017862ad0d074d4e09fdab2dad 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -839,6 +839,12 @@ const char kKioskMode[]                     = "kiosk";
 // See http://crbug.com/31395.
 const char kKioskModePrinting[]             = "kiosk-printing";
 
+// Use this server address ledger.
+const char kLedgerServer[]                  = "ledger-server";
+
+// Use this tracing token for ledger.
+const char kLedgerTracingToken[]            = "ledger-tracing-token";
+
 // Causes Chrome to attempt to get metadata from the webstore for the
 // given item, and then prompt the user to download and install it.
 const char kLimitedInstallFromWebstore[]    = "limited-install-from-webstore";