Introduced the URLBlacklistManager, and wired it to various places.

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 e17e841369c0f990681cfe7ff078f7f6bdcf6de4..1494d3016d59659c86fd3a899d842a644b9df25d 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -334,6 +334,12 @@ const char kDisableSpdy[] = "spdy.disabled";
 // Disables the listed protocol schemes.
 const char kDisabledSchemes[] = "protocol.disabled_schemes";
 
+// Blocks access to the listed host patterns.
+const char kUrlBlacklist[] = "policy.url_blacklist";
+
+// Allows access to the listed host patterns, as exceptions to the blacklist.
+const char kUrlWhitelist[] = "policy.url_whitelist";
+
 // Boolean pref indicating whether the instant confirm dialog has been shown.
 const char kInstantConfirmDialogShown[] = "instant.confirm_dialog_shown";