[Mac] Flip the flag for multi-profiles to on by default.

chrome/browser/ui/cocoa/browser_test_helper.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/cocoa/browser_test_helper.h"
 
 BrowserTestHelper::BrowserTestHelper()
     : ui_thread_(BrowserThread::UI, &message_loop_),
       file_thread_(new BrowserThread(BrowserThread::FILE, &message_loop_)),
       io_thread_(new BrowserThread(BrowserThread::IO, &message_loop_)) {
   profile_.reset(new TestingProfile());
   profile_->CreateBookmarkModel(true);
   profile_->BlockUntilBookmarkModelLoaded();
 
   // TODO(shess): These are needed in case someone creates a browser
   // window off of browser_.  pkasting indicates that other
   // platforms use a stub |BrowserWindow| and thus don't need to do
   // this.
   // http://crbug.com/39725
   profile_->CreateAutocompleteClassifier();
   profile_->CreateTemplateURLService();
 
+  SetUpProfileManager();
+
   browser_.reset(new Browser(Browser::TYPE_TABBED, profile_.get()));
 }
 
 BrowserTestHelper::~BrowserTestHelper() {
   // Delete the testing profile on the UI thread. But first release the
   // browser, since it may trigger accesses to the profile upon destruction.
   browser_.reset();
   message_loop_.DeleteSoon(FROM_HERE, profile_.release());
 
   // Make sure any pending tasks run before we destroy other threads.
@@ skipping 16 matching lines @@
 }
 
 void BrowserTestHelper::CloseBrowserWindow() {
   // Check to make sure a window was actually created.
   DCHECK(browser_->window());
   browser_->CloseAllTabs();
   browser_->CloseWindow();
   // |browser_| will be deleted by its BrowserWindowController.
   ignore_result(browser_.release());
 }
+
+void BrowserTestHelper::SetUpProfileManager() {
+  profile_manager_ = new TestingProfileManager;  // Owned by browser_process_.
+  browser_process()->SetProfileManager(profile_manager_);
+
+  profile_info_.reset(profile_manager_->CreateFakeInfo("Testing Profile"));
+  profile_manager_->AddTestingProfile(profile(), profile_info_.get());
+}