Enable/disable extensions upon changes in blacklist.

extensions/browser/extension_prefs.cc

Index: extensions/browser/extension_prefs.cc
diff --git a/extensions/browser/extension_prefs.cc b/extensions/browser/extension_prefs.cc
index 8e56ed73ddce65707ea4252dfb57a61878d6e865..8800ec68e5dae49a7212505a59808373e0dd38a0 100644
--- a/extensions/browser/extension_prefs.cc
+++ b/extensions/browser/extension_prefs.cc
@@ -66,6 +66,9 @@ const char kPrefVersion[] = "manifest.version";
 // Indicates whether an extension is blacklisted.
 const char kPrefBlacklist[] = "blacklist";
 
+// If extension is greylisted.
+const char kPrefBlacklistState[] = "blacklist_state";
+
 // The count of how many times we prompted the user to acknowledge an
 // extension.
 const char kPrefAcknowledgePromptCount[] = "ack_prompt_count";
@@ -1146,6 +1149,25 @@ void ExtensionPrefs::SetExtensionState(const std::string& extension_id,
   content_settings_store_->SetExtensionState(extension_id, enabled);
 }
 
+void ExtensionPrefs::SetExtensionBlacklistState(const std::string& extension_id,
+                                                BlacklistState state) {
+  SetExtensionBlacklisted(extension_id, state == BLACKLISTED_MALWARE);
+  UpdateExtensionPref(extension_id, kPrefBlacklistState,
+                      new base::FundamentalValue(state));
+}
+
+BlacklistState ExtensionPrefs::GetExtensionBlacklistState(
+    const std::string& extension_id) {
+  if (IsExtensionBlacklisted(extension_id))
+    return BLACKLISTED_MALWARE;
+  const base::DictionaryValue* ext_prefs = GetExtensionPref(extension_id);
+  int int_value;
+  if (ext_prefs && ext_prefs->GetInteger(kPrefBlacklistState, &int_value))
+    return static_cast<BlacklistState>(int_value);
+
+  return NOT_BLACKLISTED;
+}
+
 std::string ExtensionPrefs::GetVersionString(const std::string& extension_id) {
   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
   if (!extension)