Split non-//content parts from ContentAutofillDriverFactory

components/autofill/core/browser/autofill_driver_factory.h

+// Copyright 2017 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 AUTOFILL_CORE_BROWSER_AUTOFILL_DRIVER_FACTORY_H_
+#define AUTOFILL_CORE_BROWSER_AUTOFILL_DRIVER_FACTORY_H_
+
+#include <memory>
+#include <unordered_map>
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+
+namespace autofill {
+
+class AutofillClient;
+class AutofillDriver;
+
+// Manages the lifetime of AutofillDrivers for a particular AutofillClient by
+// creating, retrieveing and deleting on demand.
+class AutofillDriverFactory {
+  // The API is protected to guarantee subclasses that nothing else can
+  // interfere with the map of drivers.
+ protected:
+  explicit AutofillDriverFactory(AutofillClient* client);
+
+  ~AutofillDriverFactory();
+
+  // A convenience function to retrieve an AutofillDriver for the given key or
+  // null if there is none.
+  AutofillDriver* DriverForKey(void* key);
+
+  // Adds a driver, constructed by calling |factory_method|, for |key|. If there
+  // already is a driver for |key|, |factory_method| is not called.
+  void AddForKey(
+      void* key,
+      base::Callback<std::unique_ptr<AutofillDriver>()> factory_method);
+
+  // Deletes the AutofillDriver for |key|.
+  void DeleteForKey(void* key);
+
+  // Handles finished navigation in any of the frames.
+  void NavigationFinished();
+
+  // Handles hiding of the corresponding tab.
+  void TabHidden();
+
+  AutofillClient* client() { return client_; };
+
+ private:
+  AutofillClient* const client_;
+
+  std::unordered_map<void*, std::unique_ptr<AutofillDriver>> driver_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutofillDriverFactory);
+};
+
+}  // namespace autofill
+
+#endif  // AUTOFILL_CORE_BROWSER_AUTOFILL_DRIVER_FACTORY_H_