Inactive user toast. Set chrome as default.

BUG=129499
TEST=see bug
Review URL: https://chromiumcodereview.appspot.com/10826108

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149941 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chrome_browser_main.cc

@@ -795,6 +795,13 @@ int ChromeBrowserMainParts::PreCreateThreadsImpl() {
       return chrome::RESULT_CODE_NORMAL_EXIT_CANCEL;
     if (answer == TryChromeDialogView::UNINSTALL_CHROME)
       return chrome::RESULT_CODE_NORMAL_EXIT_EXP2;
+    // At this point the user is willing to try chrome again.
+    if (answer == TryChromeDialogView::TRY_CHROME_AS_DEFAULT) {
+      // Only set in the unattended case, the interactive case is Windows 8.
+      if (ShellIntegration::CanSetAsDefaultBrowser() ==
+          ShellIntegration::SET_DEFAULT_UNATTENDED)
+        ShellIntegration::SetAsDefaultBrowser();
+    }
 #else
     // We don't support retention experiments on Mac or Linux.
     return content::RESULT_CODE_NORMAL_EXIT;