Enable import/export of passwords into/from Password Manager

components/password_manager/core/browser/import/password_importer.h

Index: components/password_manager/core/browser/import/password_importer.h
diff --git a/components/password_manager/core/browser/import/password_importer.h b/components/password_manager/core/browser/import/password_importer.h
new file mode 100644
index 0000000000000000000000000000000000000000..d2e7f2465b15a18a0d5b904ec4c8c7c920d2347e
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+++ b/components/password_manager/core/browser/import/password_importer.h
@@ -0,0 +1,59 @@
+// Copyright 2016 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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_IMPORT_PASSWORD_IMPORTER_H_
+#define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_IMPORT_PASSWORD_IMPORTER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+
+namespace autofill {
+struct PasswordForm;
+}
+
+namespace base {
+class FilePath;
+class TaskRunner;
+}
+
+namespace password_manager {
+
+class PasswordImporter {
+ public:
+  enum Result {
+    SUCCESS,
+    IO_ERROR,
+    SYNTAX_ERROR,
+    SEMANTIC_ERROR,
+    NUM_IMPORT_RESULTS
+  };
+
+  typedef base::Callback<void(Result,
+                              const std::vector<autofill::PasswordForm>&)>
+      CompletionCallback;
+
+  // Imports passwords from the file at |path|, and fires |completion| callback
+  // on the calling thread with the passwords when ready. Blocking IO operations
+  // will be posted to |blocking_task_runner|. The file format should correspond
+  // to the extension of the file.
+  static void Import(const base::FilePath& path,
+                     scoped_refptr<base::TaskRunner> blocking_task_runner,
+                     const CompletionCallback& completion);
+
+  // Returns the file extensions corresponding to supported formats.
+  static std::vector<std::vector<base::FilePath::StringType>>
+  GetSupportedFileExtensions();
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(PasswordImporter);
+};
+
+}  // namespace password_manager
+
+#endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_IMPORT_PASSWORD_IMPORTER_H_