Move importer messages to common

chrome/browser/importer/importer_creator.h

+// Copyright (c) 2011 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_IMPORTER_IMPORTER_CREATOR_H_
+#define CHROME_BROWSER_IMPORTER_IMPORTER_CREATOR_H_
+
+#include <string>
+
+#include "chrome/common/importer/importer_type.h"
+
+class Importer;
+
+namespace importer {
+
+// Creates an Importer of the specified |type|.
+Importer* CreateImporterByType(ImporterType type);
+
+// Logs to UMA that an Importer of the specified |type| was used. Uses
+// |metric_postfix| to split by entry point. Note: Values passed via
+// |metric_postfix| require a matching "Import.ImporterType.|metric_postfix|"
+// entry in tools/metrics/histograms/histograms.xml.
+void LogImporterUseToMetrics(const std::string& metric_prefix,
+                             ImporterType type);
+
+}  // namespace importer
+
+#endif  // CHROME_BROWSER_IMPORTER_IMPORTER_CREATOR_H_