Make Blacklist::IsBlacklist asynchronous (it will need to be for safe

chrome/browser/extensions/test_blacklist.cc

Index: chrome/browser/extensions/test_blacklist.cc
diff --git a/chrome/browser/extensions/test_blacklist.cc b/chrome/browser/extensions/test_blacklist.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d6a4d26432f3ee870a4bb34e1ac1c9f09d46f2e5
--- /dev/null
+++ b/chrome/browser/extensions/test_blacklist.cc
@@ -0,0 +1,40 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/extensions/test_blacklist.h"
+
+#include <set>
+
+#include "base/bind.h"
+#include "base/message_loop.h"
+#include "base/run_loop.h"
+#include "chrome/browser/extensions/blacklist.h"
+
+namespace extensions {
+
+TestBlacklist::TestBlacklist(Blacklist* blacklist)
+    : blacklist_(blacklist) {
+}
+
+namespace {
+
+void IsBlacklistedCallback(std::set<std::string>* out,
+                           const std::set<std::string>& in) {
+  *out = in;
+}
+
+}  // namespace
+
+bool TestBlacklist::IsBlacklisted(const std::string& extension_id) {
+  std::set<std::string> blacklist_set;
+  blacklist_->IsBlacklisted(
+      extension_id,
+      base::Bind(&IsBlacklistedCallback, &blacklist_set));
+  base::RunLoop run_loop;
+  MessageLoop::current()->PostTask(FROM_HERE, run_loop.QuitClosure());
+  run_loop.Run();
+  return blacklist_set.count(extension_id) > 0;
+}
+
+}  // namespace extensions