[rlz,cros] RLZ glue for ChromeOS.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index cdc5d44f3574347a679224c4519009d2685b4bc1..1f31fc9cd7b08ddc7fffdbf1b7b2ca14dddb843c 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2131,4 +2131,12 @@ const char kNetworkProfileLastWarningTime[] =
 // by UMA_HISTOGRAM_ENUMERATION.
 const char kLastPolicyStatisticsUpdate[] = "policy.last_statistics_update";
 
+#if defined(OS_CHROMEOS)
+// Indicates whether the RLZ tracking has been enabled by user.
+const char kRLZEnabled[] = "rlz.enabled";
+
+// The RLZ brand code, if enabled.
+const char kRLZBrand[] = "rlz.brand";
+#endif
+
 }  // namespace prefs