Don't show post extension install bubbles when incognito mode is forced.

chrome/browser/ui/extensions/extension_install_ui_default.cc

Index: chrome/browser/ui/extensions/extension_install_ui_default.cc
diff --git a/chrome/browser/ui/extensions/extension_install_ui_default.cc b/chrome/browser/ui/extensions/extension_install_ui_default.cc
index eff9b8a23fb31632bacfa588ce0ad04ae313d236..9a44267b083025905cfa5f007ca6bd9b569caf61 100644
--- a/chrome/browser/ui/extensions/extension_install_ui_default.cc
+++ b/chrome/browser/ui/extensions/extension_install_ui_default.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/extensions/theme_installed_infobar_delegate.h"
 #include "chrome/browser/infobars/confirm_infobar_delegate.h"
 #include "chrome/browser/infobars/infobar_service.h"
+#include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/themes/theme_service.h"
@@ -55,6 +56,10 @@ namespace {
 bool disable_failure_ui_for_tests = false;
 
 Browser* FindOrCreateVisibleBrowser(Profile* profile) {
+  // TODO(mpcomplete): remove this workaround for http://crbug.com/244246
+  // after fixing http://crbug.com/38676.
+  if (!IncognitoModePrefs::CanOpenBrowser(profile))
+    return NULL;
   Browser* browser =
       chrome::FindOrCreateTabbedBrowser(profile, chrome::GetActiveDesktop());
   if (browser->tab_strip_model()->count() == 0)
@@ -67,7 +72,8 @@ void ShowExtensionInstalledBubble(const extensions::Extension* extension,
                                   Profile* profile,
                                   const SkBitmap& icon) {
   Browser* browser = FindOrCreateVisibleBrowser(profile);
-  chrome::ShowExtensionInstalledBubble(extension, browser, icon);
+  if (browser)
+    chrome::ShowExtensionInstalledBubble(extension, browser, icon);
 }
 
 void OnAppLauncherEnabledCompleted(const extensions::Extension* extension,
@@ -176,16 +182,18 @@ void ExtensionInstallUI::OpenAppInstalledUI(Profile* profile,
       content::Details<const std::string>(&app_id));
 #else
   Browser* browser = FindOrCreateVisibleBrowser(profile);
-  GURL url(chrome::IsInstantExtendedAPIEnabled() ?
-           chrome::kChromeUIAppsURL : chrome::kChromeUINewTabURL);
-  chrome::NavigateParams params(
-      chrome::GetSingletonTabNavigateParams(browser, url));
-  chrome::Navigate(&params);
+  if (browser) {
+    GURL url(chrome::IsInstantExtendedAPIEnabled() ?
+             chrome::kChromeUIAppsURL : chrome::kChromeUINewTabURL);
+    chrome::NavigateParams params(
+        chrome::GetSingletonTabNavigateParams(browser, url));
+    chrome::Navigate(&params);
 
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_APP_INSTALLED_TO_NTP,
-      content::Source<WebContents>(params.target_contents),
-      content::Details<const std::string>(&app_id));
+    content::NotificationService::current()->Notify(
+        chrome::NOTIFICATION_APP_INSTALLED_TO_NTP,
+        content::Source<WebContents>(params.target_contents),
+        content::Details<const std::string>(&app_id));
+  }
 #endif
 }