Split Blacklist from ExtensionSystem.

chrome/browser/extensions/blacklist.cc

Index: chrome/browser/extensions/blacklist.cc
diff --git a/chrome/browser/extensions/blacklist.cc b/chrome/browser/extensions/blacklist.cc
index 2e5024246c254a64e876cd6612a80722c909cee2..3a44a0f7a49cb46f420db9dad2e7f712efef86f7 100644
--- a/chrome/browser/extensions/blacklist.cc
+++ b/chrome/browser/extensions/blacklist.cc
@@ -14,6 +14,7 @@
 #include "base/stl_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/extensions/blacklist_factory.h"
 #include "chrome/browser/extensions/blacklist_state_fetcher.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
@@ -180,6 +181,11 @@ Blacklist::Blacklist(ExtensionPrefs* prefs) {
 Blacklist::~Blacklist() {
 }
 
+// static
+Blacklist* Blacklist::Get(content::BrowserContext* context) {
+  return BlacklistFactory::GetForBrowserContext(context);
+}
+
 void Blacklist::GetBlacklistedIDs(const std::set<std::string>& ids,
                                   const GetBlacklistedIDsCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);