Tests for incognito app install, plus some cleanup.

chrome/browser/extensions/extension_install_ui.cc

Index: chrome/browser/extensions/extension_install_ui.cc
diff --git a/chrome/browser/extensions/extension_install_ui.cc b/chrome/browser/extensions/extension_install_ui.cc
index f0634d33356b668bb919e41972bcc13c239bed70..3f3af1237de2ac93be57588a3b6d49e7d299ac2a 100644
--- a/chrome/browser/extensions/extension_install_ui.cc
+++ b/chrome/browser/extensions/extension_install_ui.cc
@@ -133,10 +133,13 @@ void ExtensionInstallUI::OnInstallSuccess(const Extension* extension,
     return;
   }
 
-  // Note that browser actions don't appear in incognito mode initially,
-  // so be sure to use a normal browser window.
   Profile* profile = profile_;
-  if (extension->browser_action())
+  // Browser actions don't appear in incognito mode initially,
+  // so be sure to use a normal browser window.  The apps panel (which
+  // has a nice animation for the newly installed app) is not available
+  // in incognito mode (until http://crbug.com/63751 is fixed) so we need a
+  // normal browser window for that too.
+  if (extension->browser_action() || extension->is_app())
     profile = profile->GetOriginalProfile();
   Browser* browser = Browser::GetOrCreateTabbedBrowser(profile);
   if (browser->tab_count() == 0)