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

chrome/browser/shell_integration_win.cc

Index: chrome/browser/shell_integration_win.cc
diff --git a/chrome/browser/shell_integration_win.cc b/chrome/browser/shell_integration_win.cc
index 869b5b51311f5ff8019a259bc8d3301c07c44629..780a44fca86ecb71b7dfbe0501db0d400fd8ae4c 100644
--- a/chrome/browser/shell_integration_win.cc
+++ b/chrome/browser/shell_integration_win.cc
@@ -389,8 +389,15 @@ void MigrateChromiumShortcutsCallback() {
 
 }  // namespace
 
-bool ShellIntegration::CanSetAsDefaultBrowser() {
-  return BrowserDistribution::GetDistribution()->CanSetAsDefault();
+ShellIntegration::DefaultSettingsChangePermission
+    ShellIntegration::CanSetAsDefaultBrowser() {
+  if (!BrowserDistribution::GetDistribution()->CanSetAsDefault())
+    return CHANGE_DEFAULT_NOT_ALLOWED;
+
+  if (base::win::GetVersion() >= base::win::VERSION_WIN8)
+    return CHANGE_DEFAULT_INTERACTIVE;
+  else
+    return CHANGE_DEFAULT_UNATTENDED;
 }
 
 bool ShellIntegration::SetAsDefaultBrowser() {
@@ -435,6 +442,24 @@ bool ShellIntegration::SetAsDefaultProtocolClient(const std::string& protocol) {
   return true;
 }
 
+bool ShellIntegration::SetAsDefaultBrowserInteractive() {
+  FilePath chrome_exe;
+  if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
+    NOTREACHED() << "Error getting app exe path";
+    return false;
+  }
+
+  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
+  if (!ShellUtil::ShowMakeChromeDefaultSystemUI(dist, ShellUtil::CURRENT_USER,
+                                                chrome_exe.value(), true)) {
+    LOG(ERROR) << "Failed to launch the set-default-browser Windows UI.";
+    return false;
+  }
+
+  VLOG(1) << "Set-as-default Windows UI triggered.";
+  return true;
+}
+
 ShellIntegration::DefaultWebClientState ShellIntegration::IsDefaultBrowser() {
   // When we check for default browser we don't necessarily want to count file
   // type handlers and icons as having changed the default browser status,