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 078d05f7cc6c96761584da638b33cb5bbce2a9b0..64a90b5b29057e53ed4baf3394fc4631b3ceaabd 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -329,6 +329,12 @@ 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 kHostBlacklist[] = "policy.host_blacklist";
+
+// Allows access to the listed host patterns, as exceptions to the blacklist.
+const char kHostWhitelist[] = "policy.host_whitelist";
+
 // Boolean pref indicating whether the instant confirm dialog has been shown.
 const char kInstantConfirmDialogShown[] = "instant.confirm_dialog_shown";