Support for interactive set-chrome-as-default in Windows.

chrome/installer/util/shell_util.h

 // Copyright (c) 2012 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.
 //
 // This file declares methods that are useful for integrating Chrome in
 // Windows shell. These methods are all static and currently part of
 // ShellUtil class.
 
 #ifndef CHROME_INSTALLER_UTIL_SHELL_UTIL_H_
 #define CHROME_INSTALLER_UTIL_SHELL_UTIL_H_
@@ skipping 219 matching lines @@
   //               level or user level. If value has ShellChange::SYSTEM_LEVEL
   //               we should be running as admin user.
   // chrome_exe: The chrome.exe path to register as default browser.
   // elevate_if_not_admin: On Vista if user is not admin, try to elevate for
   //                       Chrome registration.
   static bool MakeChromeDefault(BrowserDistribution* dist,
                                 int shell_change,
                                 const string16& chrome_exe,
                                 bool elevate_if_not_admin);
 
+  // Shows to the user a system dialog where Chrome can be set as the
+  // default browser. This is intended for Windows 8, but is known to work
+  // on Windows 7, too. This is a blocking call.

[gab, 2012/05/31 22:17:20]

Please change "This is intended for Windows 8, but is known to work on Windows
7, too."
to "This is intended for Windows 8 and above only."

So that the contract in the comment matches the implementation.

[grt (UTC plus 2), 2012/06/01 14:36:39]

Agreed.  If you'd like to leave a note for posterity indicating that it
technically does work in Win7 as well, please put it in the implementation since
it's not relevant to consumers of this function.

[motek., 2012/06/01 20:50:17]

Done.

[motek., 2012/06/01 20:50:17]

Ack.

+  //
+  // Parameters as MakeChromeDefault.
+  static bool ShowMakeChromeDefaultSystemUI(BrowserDistribution* dist,
+                                            int shell_change,

[grt (UTC plus 2), 2012/06/01 14:36:39]

is this parameter needed?  my understanding is that this function is purely a
per-user operation.

[motek., 2012/06/01 20:50:17]

Done.

+                                            const string16& chrome_exe,
+                                            bool elevate_if_not_admin);
+
   // Make Chrome the default application for a protocol.
   // chrome_exe: The chrome.exe path to register as default browser.
   // protocol: The protocol to register as the default handler for.
   static bool MakeChromeDefaultProtocolClient(BrowserDistribution* dist,
                                               const string16& chrome_exe,
                                               const string16& protocol);
 
   // This method adds Chrome to the list that shows up in Add/Remove Programs->
   // Set Program Access and Defaults and also creates Chrome ProgIds under
   // Software\Classes. This method requires write access to HKLM so is just
@@ skipping 94 matching lines @@
                                    const string16& icon_path,
                                    int icon_index,
                                    uint32 options);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellUtil);
 };
 
 
 #endif  // CHROME_INSTALLER_UTIL_SHELL_UTIL_H_