Implement support for importing favorites from Edge on Windows 10.

chrome/common/importer/edge_importer_utils_win.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.
+
+#ifndef CHROME_COMMON_IMPORTER_EDGE_IMPORTER_UTILS_WIN_H_
+#define CHROME_COMMON_IMPORTER_EDGE_IMPORTER_UTILS_WIN_H_
+
+#include "base/files/file_path.h"
+#include "base/strings/string16.h"
+
+namespace importer {
+
+// Returns the key to be used in HKCU to look for Edge's favorites order blob.
+// Overridable by tests via IEImporterTestRegistryOverrider.

[Ilya Sherman, 2015/11/26 02:04:44]

Why does the overrider have "IE" in its name, if it's overriding Edge data?

[forshaw, 2015/11/30 12:57:58]

I repurpose the IE registry overrider which is has the exact same functionality
I'd need for supporting the edge tests, there seemed little reason to implement
the same functionality twice, but also not sure it was worth renaming the class.
I could do.

[Ilya Sherman, 2015/12/01 07:31:18]

I think it might be useful to rename the class.  For example, you could just
drop the "IE" prefix, or possibly replace it with "Windows".  It's not a big
deal, though.

+base::string16 GetEdgeFavoritesOrderKey();
+
+// Returns the key to be used in HKCU to look for Edge's settings.
+// Overridable by tests via IEImporterTestRegistryOverrider.
+base::string16 GetEdgeSettingsKey();
+
+// Returns the data path for the Edge browser. Returns an empty path on error.
+base::FilePath GetEdgeDataFilePath();
+
+// Returns true if Edge favorites is current in legacy (pre-Edge 13) mode.

[Ilya Sherman, 2015/11/26 02:04:44]

nit: "current in" -> "currently in"?

[forshaw, 2015/11/30 12:57:58]

Acknowledged.

+bool IsEdgeFavoritesLegacyMode();
+
+// Returns true if the Edge browser is installed and available for import.
+bool EdgeImporterCanImport();
+
+}  // namespace importer
+
+#endif  // CHROME_COMMON_IMPORTER_EDGE_IMPORTER_UTILS_WIN_H_