Use last active profile instead of default profile in profile manager

chrome/browser/profiles/profile_manager.cc

 // Copyright (c) 2012 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/profiles/profile_manager.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 1088 matching lines @@
   if (profile_info && !profile_info->created)
     default_profile_dir = profiles::GetDefaultProfileDir(user_data_dir);
 
   Profile* profile = GetProfile(default_profile_dir);
   // Some unit tests didn't initialize the UserManager.
   if (user_manager::UserManager::IsInitialized() &&
       user_manager::UserManager::Get()->IsLoggedInAsGuest())
     return profile->GetOffTheRecordProfile();
   return profile;
 #else
-  base::FilePath default_profile_dir(user_data_dir);
-  default_profile_dir = default_profile_dir.Append(GetInitialProfileDir());

[Mr4D (OOO till 08-26), 2015/04/15 19:26:21]

Looking into line 473 above there is a TODO comment from mirandac which makes me
wonder what that is about, but then again - that was from 2011 and it is
questionable on how this function is/was used since then.

-  return GetProfile(default_profile_dir);
+  return GetProfile(GetLastUsedProfileDir(user_data_dir));
 #endif
 }
 
 bool ProfileManager::AddProfile(Profile* profile) {
   TRACE_EVENT0("browser", "ProfileManager::AddProfile");
   DCHECK(profile);
 
   // Make sure that we're not loading a profile with the same ID as a profile
   // that's already loaded.
   if (GetProfileByPathInternal(profile->GetPath())) {
@@ skipping 270 matching lines @@
   }
 
   FinishDeletingProfile(profile_to_delete_path, new_active_profile_path);
   if (!original_callback.is_null())
     original_callback.Run(loaded_profile, status);
 }
 
 ProfileManagerWithoutInit::ProfileManagerWithoutInit(
     const base::FilePath& user_data_dir) : ProfileManager(user_data_dir) {
 }