Fix crash when locking a profile.

chrome/browser/extensions/api/principals_private/principals_private_api.cc

Index: chrome/browser/extensions/api/principals_private/principals_private_api.cc
diff --git a/chrome/browser/extensions/api/principals_private/principals_private_api.cc b/chrome/browser/extensions/api/principals_private/principals_private_api.cc
index e1902a2335dbc4146d3f0ad826c7f4b3d9a827e0..f08bd6df868ce203d33e48669eaa206e0c40f998 100644
--- a/chrome/browser/extensions/api/principals_private/principals_private_api.cc
+++ b/chrome/browser/extensions/api/principals_private/principals_private_api.cc
@@ -6,7 +6,7 @@
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/avatar_menu.h"
-#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
@@ -25,10 +25,7 @@ bool PrincipalsPrivateExtensionFunction::RunImpl() {
 bool PrincipalsPrivateSignOutFunction::RunImplSafe() {
   Browser* browser = GetCurrentBrowser();
   if (browser) {
-    AvatarMenu avatar_menu(
-        &g_browser_process->profile_manager()->GetProfileInfoCache(), NULL,
-        browser);
-    avatar_menu.BeginSignOut();
+    profiles::LockProfile(browser->profile());
   }
   return true;
 }