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

chrome/browser/file_associations_win.h

+// Copyright 2014 The Chromium Authors. All rights reserved.

[gab, 2014/09/12 13:32:36]

Isn't there a better (more specific) directory for this than chrome/browser?

[Matt Giuca, 2014/09/15 03:49:45]

Maybe -- I wanted to make it a peer of shell_integration_win, which is why it's
here.

Let's wait until the rest is sorted out. I may end up just deleting this file
because it's essentially a thin wrapper around functions in shell_util now.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_FILE_ASSOCIATIONS_WIN_H_
+#define CHROME_BROWSER_FILE_ASSOCIATIONS_WIN_H_
+
+#include <set>
+#include <string>
+
+// This module is for manipulating per-user Windows file associations from an
+// unprivileged process (ie, Chrome itself). For the code that establishes the
+// machine-level associations during the Chrome installer, see
+// chrome/installer/util/shell_util.h.
+
+namespace base {
+class CommandLine;
+class FilePath;
+}
+
+// Associates a set of file extensions with a particular application in the
+// Windows registry, for the current user only. If an extension has no existing
+// default association, the given application becomes the default. Otherwise,

[gab, 2014/09/12 13:32:36]

Again, verify your claim about grabbing default on Win7 and Win8.

+// the application is added to the Open With menu for this type, but does not
+// become the default.
+//
+// |progid| is the unique internal name Windows will use for file associations
+// with this application.
+// |command_line| is the command to execute when opening a file via this
+// association. It should contain "%1" to pass the filename as an argument.
+// |file_type_name| and |icon_path| are the friendly name, and the path of the
+// icon, respectively, that will be used for files of these types when
+// associated with this application by default. (They are NOT the name/icon that
+// will represent the application under the Open With menu.)
+// Returns true on success; otherwise logs to stderr and returns false.
+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);
+
+// Deletes all associations with a particular application in the Windows
+// registry, for the current user only.
+// |progid| is the unique internal name Windows uses for file associations with
+// this application, as given to AddWindowsFileAssociations. All information
+// associated with this name will be deleted.
+bool DeleteWindowsFileAssociations(const std::string& progid);
+
+#endif  // CHROME_BROWSER_FILE_ASSOCIATIONS_WIN_H_