Upstream ChromeBrowserState sub-classes.

ios/chrome/browser/browser_state/chrome_browser_state_removal_controller.h

+// Copyright 2015 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 IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_REMOVAL_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_REMOVAL_CONTROLLER_H_
+
+#include <string>
+
+// Controls the removal of extra browser states.
+class ChromeBrowserStateRemovalController {
+ public:
+  static ChromeBrowserStateRemovalController* GetInstance();
+
+  // Removes the browser states marked as not to keep if they exist. It also
+  // converts the most recently used bookmarks file to an HTML representation.
+  void RemoveBrowserStatesIfNecessary();
+
+  // Returns whether a browser state has been removed. The value is conserved
+  // across application restarts.
+  bool HasBrowserStateBeenRemoved();
+
+  // Returns the GAIA Id of the removed browser state if it was authenticated.
+  // The value should not be trusted unless HasBrowserStateBeenRemoved() returns
+  // true.
+  const std::string& GetRemovedBrowserStateGAIAId() const {

[droger, 2016/02/04 13:56:14]

Optional: style for inlined method names.

[sdefresne, 2016/02/04 15:27:41]

Done.

+    return removed_browser_state_gaia_id_;
+  }
+
+  // Returns whether the last used browser sate was changed during this session.
+  bool HasChangedLastUsedBrowserState() const {

[droger, 2016/02/04 13:56:14]

Optional: style for inlined method names.

[sdefresne, 2016/02/04 15:27:41]

Done.

+    return has_changed_last_used_browser_state_;
+  }
+
+ private:
+  ChromeBrowserStateRemovalController();
+  ~ChromeBrowserStateRemovalController();
+
+  // Returns the relative path of the browser state path to keep. This value
+  // was stored from the user choice.
+  std::string GetBrowserStatePathToKeep();
+
+  // Sets whether a browser state has been removed. The value is conserved
+  // across application restarts.
+  void SetHasBrowserStateBeenRemoved(bool value);
+
+  // Returns the relative path of the last browser state used (during the
+  // previous application run).
+  std::string GetLastBrowserStatePathUsed();
+
+  // Sets the relative path of the last browser state used.
+  void SetLastBrowserStatePathUsed(const std::string& browser_state_path);
+
+  // The GAIA Id of the removed browser state (if any).
+  std::string removed_browser_state_gaia_id_;
+
+  // Whether the last used browser state was changed.
+  bool has_changed_last_used_browser_state_;
+};
+
+#endif  // IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_REMOVAL_CONTROLLER_H_