Fetch extension blacklist states from SafeBrowsing server

chrome/browser/extensions/blacklist_state_fetcher.h

Index: chrome/browser/extensions/blacklist_state_fetcher.h
diff --git a/chrome/browser/extensions/blacklist_state_fetcher.h b/chrome/browser/extensions/blacklist_state_fetcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..3c731e3556a78623508626f8d9fdff34335fbecc
--- /dev/null
+++ b/chrome/browser/extensions/blacklist_state_fetcher.h
@@ -0,0 +1,59 @@
+// Copyright 2013 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_BLACKLIST_STATE_FETCHER_H_
+#define CHROME_BROWSER_EXTENSIONS_BLACKLIST_STATE_FETCHER_H_
+
+#include <set>
+#include <string>
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/extensions/blacklist_state.h"
+#include "chrome/browser/safe_browsing/protocol_manager_helper.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_fetcher_delegate.h"
+
+namespace extensions {
+
+class BlacklistStateFetcher : public net::URLFetcherDelegate {
+ public:
+  BlacklistStateFetcher();
+
+  virtual ~BlacklistStateFetcher();
+
+  typedef base::Callback<void(BlacklistState)> RequestCallback;
+
+  virtual void Request(const std::string& id, const RequestCallback& callback);
+
+  void SetSafeBrowsingConfig(const SafeBrowsingProtocolConfig& config);
+
+ protected:
+  // net::URLFetcherDelegate interface.
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+ private:
+  GURL RequestUrl() const;
+
+  SafeBrowsingProtocolConfig safe_browsing_config_;
+  bool safe_browsing_config_initialized_;
+
+  // ID for URLFetchers for testing.
+  int url_fetcher_id_;
+
+  // Extension id by URLFetcher.
+  std::map<const net::URLFetcher*, std::string> requests_;
+
+  typedef std::multimap<std::string, RequestCallback> CallbackMultiMap;
+
+  // Callbacks by extension ID.
+  CallbackMultiMap callbacks_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlacklistStateFetcher);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_BLACKLIST_STATE_FETCHER_H_
+