[Mac, Linux] Add People in the menu bar should automatically create a default profile

This will make it have the same behaviour as the User Manager, vs. navigating to
chrome://settings/createProfile.

BUG=452125
TEST=Choose Add Person from the OS menu bar. This should create a profile and
switch to it immediately.

Review URL: https://codereview.chromium.org/870203003

Cr-Commit-Position: refs/heads/master@{#313586}

chrome/browser/ui/cocoa/profiles/profile_menu_controller.mm

@@ -15,6 +15,7 @@
 #include "chrome/browser/profiles/profile_info_interface.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_metrics.h"
+#include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_list_observer.h"
@@ -98,7 +99,9 @@ class Observer : public chrome::BrowserListObserver,
 }
 
 - (IBAction)newProfile:(id)sender {
-  avatarMenu_->AddNewProfile(ProfileMetrics::ADD_NEW_USER_MENU);
+  profiles::CreateAndSwitchToNewProfile(chrome::HOST_DESKTOP_TYPE_NATIVE,
+                                        ProfileManager::CreateCallback(),
+                                        ProfileMetrics::ADD_NEW_USER_MENU);
 }
 
 - (BOOL)insertItemsIntoMenu:(NSMenu*)menu

chrome/browser/ui/views/frame/global_menu_bar_x11.cc

@@ -21,6 +21,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
 #include "chrome/browser/sessions/tab_restore_service_factory.h"
 #include "chrome/browser/ui/browser.h"
@@ -893,5 +894,7 @@ void GlobalMenuBarX11::OnEditProfileItemActivated(DbusmenuMenuitem* sender,
 
 void GlobalMenuBarX11::OnCreateProfileItemActivated(DbusmenuMenuitem* sender,
                                                     unsigned int timestamp) {
-  avatar_menu_->AddNewProfile(ProfileMetrics::ADD_NEW_USER_MENU);
+  profiles::CreateAndSwitchToNewProfile(chrome::HOST_DESKTOP_TYPE_NATIVE,
+                                        ProfileManager::CreateCallback(),
+                                        ProfileMetrics::ADD_NEW_USER_MENU);
 }