ProfileManager: Remove CHECKs.

chrome/browser/profiles/profile_manager.h

 // 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.
 
 // This class keeps track of the currently-active profiles in the runtime.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_MANAGER_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_MANAGER_H_
 #pragma once
 
@@ skipping 300 matching lines @@
   scoped_ptr<ProfileInfoCache> profile_info_cache_;
 
 #if defined(OS_WIN)
   // Manages the creation, deletion, and renaming of Windows shortcuts by
   // observing the ProfileInfoCache.
   scoped_ptr<ProfileShortcutManagerWin> profile_shortcut_manager_;
 #endif
 
   // For keeping track of the last active profiles.
   std::map<Profile*, int> browser_counts_;
+  // On startup we launch the active profiles in the order they became active
+  // during the last run. This is why they are kept in a list, not in a set.
   std::vector<Profile*> active_profiles_;
   bool shutdown_started_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileManager);
 };
 
 // Same as the ProfileManager, but doesn't initialize some services of the
 // profile. This one is useful in unittests.
 class ProfileManagerWithoutInit : public ProfileManager {
  public:
   explicit ProfileManagerWithoutInit(const FilePath& user_data_dir);
 
  protected:
   virtual void DoFinalInitForServices(Profile*, bool) OVERRIDE {}
   virtual void DoFinalInitLogging(Profile*) OVERRIDE {}
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_MANAGER_H_