Implement support for importing favorites from Edge on Windows 10.

chrome/common/importer/edge_importer_utils_win.cc

+// 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.
+
+#include "chrome/common/importer/edge_importer_utils_win.h"
+
+#include <Shlobj.h>
+
+#include "base/files/file.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/win/registry.h"
+#include "base/win/windows_version.h"
+#include "chrome/common/importer/importer_test_registry_overrider_win.h"
+
+namespace {
+
+const base::char16 kEdgeSettingsMainKey[] = L"MicrosoftEdge\\Main";
+
+const base::char16 kEdgePackageName[] =
+    L"microsoft.microsoftedge_8wekyb3d8bbwe";
+
+// We assume at the moment that the package name never changes for Edge.
+base::string16 GetEdgePackageName() {
+  return kEdgePackageName;
+}
+
+base::string16 GetEdgeRegistryKey(const base::string16& key_name) {
+  base::string16 registry_key =
+      L"Software\\Classes\\Local Settings\\"
+      L"Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\"
+      L"Storage\\";
+  registry_key += GetEdgePackageName();
+  registry_key += L"\\";
+  registry_key += key_name;
+  return registry_key;
+}
+
+base::string16 GetPotentiallyOverridenEdgeKey(
+    const base::string16& desired_key_path) {
+  base::string16 test_registry_override(
+      ImporterTestRegistryOverrider::GetTestRegistryOverride());
+  return test_registry_override.empty() ? GetEdgeRegistryKey(desired_key_path)
+                                        : test_registry_override;
+}
+
+}  // namespace
+
+namespace importer {
+
+base::string16 GetEdgeSettingsKey() {
+  return GetPotentiallyOverridenEdgeKey(kEdgeSettingsMainKey);
+}
+
+base::FilePath GetEdgeDataFilePath() {
+  wchar_t buffer[MAX_PATH];
+  if (::SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA, NULL, SHGFP_TYPE_CURRENT,
+                        buffer) != S_OK)
+    return base::FilePath();
+
+  base::FilePath base_path(buffer);
+  base::string16 rel_path = L"Packages\\";
+  rel_path += GetEdgePackageName();
+  rel_path += L"\\AC\\MicrosoftEdge\\User\\Default";
+  return base_path.Append(rel_path);
+}
+
+bool IsEdgeFavoritesLegacyMode() {
+  base::win::RegKey key(HKEY_CURRENT_USER, GetEdgeSettingsKey().c_str(),
+                        KEY_READ);
+  DWORD ese_enabled = 0;
+  // Check whether Edge is using the new Extensible Store Engine (ESE) format
+  // for its favorites.
+  if (key.ReadValueDW(L"FavoritesESEEnabled", &ese_enabled) == ERROR_SUCCESS)

[ananta, 2015/12/01 19:36:35]

This defaults to true?

[forshaw, 2015/12/02 18:21:54]

Yes, if the registry key doesn't exist then legacy favorites is in use (as when
Edge 13 upgrades it then writes the key).

+    return !ese_enabled;
+  return true;
+}
+
+bool EdgeImporterCanImport() {
+  base::File::Info file_info;
+  if (base::win::GetVersion() < base::win::VERSION_WIN10)
+    return false;
+  return base::GetFileInfo(GetEdgeDataFilePath(), &file_info) &&
+         file_info.is_directory;
+}
+
+}  // namespace importer