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

chrome/installer/util/shell_util.h

Index: chrome/installer/util/shell_util.h
diff --git a/chrome/installer/util/shell_util.h b/chrome/installer/util/shell_util.h
index 85e5fbd7d0f9e8123a5e2b2157810f3ad4ede95f..d0cf5b5c62c28f57470f2f67198199e1f565b3a7 100644
--- a/chrome/installer/util/shell_util.h
+++ b/chrome/installer/util/shell_util.h
@@ -237,6 +237,11 @@ class ShellUtil {
                                 const string16& chrome_exe,
                                 bool elevate_if_not_admin);
 
+  static bool ShowMakeChromeDefaultSystemUI(BrowserDistribution* dist,
+                                            int shell_change,
+                                            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.
@@ -244,18 +249,18 @@ class ShellUtil {
                                               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
-  // best effort deal. If write to HKLM fails and elevate_if_not_admin is true,
-  // this method will:
+  // This method registers Chrome with Windows (e.g., with "Set Program Access
+  // and Defaults" or "Default Programs", as an http protocol handler, etc.).
+  // This method requires write access to HKLM unless this is a user-level
+  // install on Windows 8 and above. If writing to HKLM fails and
+  // elevate_if_not_admin is true, this method will:
   // - add the ProgId entries to HKCU on XP. HKCU entries will not make
   //   Chrome show in Set Program Access and Defaults but they are still useful
   //   because we can make Chrome run when user clicks on http link or html
   //   file.
-  // - will try to launch setup.exe with admin priviledges on Vista to do
-  //   these tasks. Users will see standard Vista elevation prompt and if they
-  //   enter the right credentials, the write operation will work.
+  // - will try to launch setup.exe with admin privileges on Vista and above to
+  //   do these tasks. Users will see the standard UAC prompt and if they enter
+  //   the right credentials, the write operation will work.
   // Currently elevate_if_not_admin is true only when user tries to make Chrome
   // default browser (through the UI or through installer options) and Chrome
   // is not registered on the machine.