Don't allow profile deletion in Metro mode.

chrome/browser/ui/webui/signin/user_manager_screen_handler.cc

Index: chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
diff --git a/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc b/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
index 91a5bce179edad88405345fd32f252e11d843bb6..165a3772e3fd286d99ac839d8da5a0e625a4cc70 100644
--- a/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
+++ b/chrome/browser/ui/webui/signin/user_manager_screen_handler.cc
@@ -9,6 +9,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/value_conversions.h"
 #include "base/values.h"
+#include "base/win/metro.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/screenlock_private/screenlock_private_api.h"
@@ -633,7 +634,8 @@ void UserManagerScreenHandler::SendUserList() {
   base::ListValue users_list;
   const ProfileInfoCache& info_cache =
       g_browser_process->profile_manager()->GetProfileInfoCache();
-
+  // Profile deletion is not allowed in Metro mode.
+  bool can_remove = !base::win::IsMetroProcess();

[tapted, 2015/01/26 23:36:07]

here too, but this might be shared with ChromeOS, so perhaps guard
ash::Shell::HasInstance() differently (or use viewerprocess:IsValid

[noms (inactive), 2015/01/28 02:20:13]

This is not shared with ChromeOS. This is desktop-only. Done.

   user_auth_type_map_.clear();
 
   for (size_t i = 0; i < info_cache.GetNumberOfProfiles(); ++i) {
@@ -657,7 +659,7 @@ void UserManagerScreenHandler::SendUserList() {
     profile_value->SetBoolean(
         kKeyNeedsSignin, info_cache.ProfileIsSigninRequiredAtIndex(i));
     profile_value->SetBoolean(kKeyIsOwner, false);
-    profile_value->SetBoolean(kKeyCanRemove, true);
+    profile_value->SetBoolean(kKeyCanRemove, can_remove);
     profile_value->SetBoolean(kKeyIsDesktop, true);
     profile_value->SetString(
         kKeyAvatarUrl, GetAvatarImageAtIndex(i, info_cache));