ShellUtil: Add generic methods to add/delete Windows file associations.

chrome/browser/file_associations_win.cc

+// Copyright 2014 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/browser/file_associations_win.h"
+
+#include <windows.h>
+#include <shlobj.h>
+
+#include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/installer/util/shell_util.h"
+
+bool AddWindowsFileAssociations(const std::string& progid,
+                                const base::CommandLine& command_line,
+                                const std::string& file_type_name,
+                                const base::FilePath& icon_path,
+                                const std::set<std::string>& file_extensions) {
+  std::set<base::string16> file_extensions_16;
+  for (std::set<std::string>::const_iterator it = file_extensions.begin();
+       it != file_extensions.end();
+       ++it) {
+    file_extensions_16.insert(base::UTF8ToUTF16(*it));
+  }
+  if (!ShellUtil::AddFileAssociations(base::UTF8ToUTF16(progid),
+                                      command_line,
+                                      base::UTF8ToUTF16(file_type_name),
+                                      icon_path,
+                                      file_extensions_16)) {
+    return false;
+  }
+
+  // Success. Tell Windows Explorer to update its cache.
+  SHChangeNotify(
+      SHCNE_ASSOCCHANGED, SHCNF_IDLIST | SHCNF_FLUSHNOWAIT, NULL, NULL);
+  return true;
+}
+
+bool DeleteWindowsFileAssociations(const std::string& progid) {
+  if (!ShellUtil::DeleteFileAssociations(base::UTF8ToUTF16(progid)))
+    return false;
+
+  // Success. Tell Windows Explorer to update its cache.
+  SHChangeNotify(
+      SHCNE_ASSOCCHANGED, SHCNF_IDLIST | SHCNF_FLUSHNOWAIT, NULL, NULL);
+  return true;
+}