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

chrome/browser/profiles/fake_profile_info_interface.h

 // 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.
 
 #ifndef CHROME_BROWSER_PROFILES_FAKE_PROFILE_INFO_INTERFACE_H_
 #define CHROME_BROWSER_PROFILES_FAKE_PROFILE_INFO_INTERFACE_H_
 
 #include <vector>
 
 #include "base/string16.h"
-#include "base/utf_string_conversions.h"
 #include "chrome/browser/profiles/avatar_menu_model.h"
 #include "chrome/browser/profiles/avatar_menu_model_observer.h"
 #include "chrome/browser/profiles/profile_info_interface.h"
-#include "chrome/common/chrome_notification_types.h"
 #include "ui/gfx/image/image.h"
 
 class FakeProfileInfo : public ProfileInfoInterface {
  public:
   FakeProfileInfo();
   virtual ~FakeProfileInfo();
 
   std::vector<AvatarMenuModel::Item*>* mock_profiles();
 
   static gfx::Image& GetTestImage();
 
   // ProfileInfoInterface:
   virtual size_t GetNumberOfProfiles() const OVERRIDE;
   virtual size_t GetIndexOfProfileWithPath(
       const FilePath& profile_path) const OVERRIDE;
   virtual string16 GetNameOfProfileAtIndex(size_t index) const OVERRIDE;
   virtual FilePath GetPathOfProfileAtIndex(size_t index) const OVERRIDE;
   virtual const gfx::Image& GetAvatarIconOfProfileAtIndex(
       size_t index) const OVERRIDE;
 
  private:
   std::vector<AvatarMenuModel::Item*> profiles_;
 };
 
 #endif  // CHROME_BROWSER_PROFILES_FAKE_PROFILE_INFO_INTERFACE_H_