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 a1dde85a382f6739f5b7d110c9c5605a8fba61dd..2f0e10ac1040ca7c8182ea91452128ca22f3a04c 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";