Revert of Move remote_db_manager into the safe_browsing_db component.

chrome/browser/safe_browsing/safe_browsing_api_handler.h

+// Copyright 2015 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.
+//
+// Glue to pass Safe Browsing API requests between
+// RemoteSafeBrowsingDatabaseManager and Java-based API to check URLs.
+
+#ifndef CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_API_HANDLER_H_
+#define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_API_HANDLER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "chrome/browser/safe_browsing/safe_browsing_util.h"
+#include "url/gurl.h"
+
+namespace safe_browsing {
+
+class SafeBrowsingApiHandler {
+ public:
+  // Singleton interface.
+  static void SetInstance(SafeBrowsingApiHandler* instance);
+  static SafeBrowsingApiHandler* GetInstance();
+
+  typedef base::Callback<void(SBThreatType sb_threat_type,
+                              const std::string& metadata)> URLCheckCallback;
+
+  // Makes Native->Java call and invokes callback when check is done.
+  virtual void StartURLCheck(const URLCheckCallback& callback,
+                             const GURL& url,
+                             const std::vector<SBThreatType>& threat_types) = 0;
+
+  virtual ~SafeBrowsingApiHandler() {}
+
+ private:
+  // Pointer not owned.
+  static SafeBrowsingApiHandler* instance_;
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_API_HANDLER_H_