Closing a guest session clears all browsing history.

chrome/browser/ui/browser_command_controller_unittest.cc

Index: chrome/browser/ui/browser_command_controller_unittest.cc
diff --git a/chrome/browser/ui/browser_command_controller_unittest.cc b/chrome/browser/ui/browser_command_controller_unittest.cc
index c70f664781399855f817ed6098c166bcb1030c0f..34592660f131271531f35b878b3cdf9bcaeb2ae3 100644
--- a/chrome/browser/ui/browser_command_controller_unittest.cc
+++ b/chrome/browser/ui/browser_command_controller_unittest.cc
@@ -8,6 +8,7 @@
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/command_updater.h"
+#include "chrome/browser/nacl_host/nacl_browser_delegate_impl.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profiles_state.h"
@@ -21,6 +22,7 @@
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/testing_profile_manager.h"
+#include "components/nacl/browser/nacl_browser.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ -260,6 +262,12 @@ TEST_F(BrowserCommandControllerTest, NewAvatarMenuEnabledInGuestMode) {
 
   ASSERT_TRUE(guest_profile->IsGuestSession());
 
+#if !defined(DISABLE_NACL)
+  // BrowserDataRemover needs a NaCl delegate.
+  nacl::NaClBrowser::SetDelegate(
+      new NaClBrowserDelegateImpl(testing_profile_manager.profile_manager()));
+#endif
+
   // Create a new browser based on the guest profile.
   Browser::CreateParams profile_params(guest_profile,
                                        chrome::GetActiveDesktop());