[iOS] Remove ChromeBrowserState::ExitType (dead code)

ios/public/provider/chrome/browser/browser_state/chrome_browser_state.h

 // Copyright 2013 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_PUBLIC_PROVIDER_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_H_
 #define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
@@ skipping 13 matching lines @@
 
 namespace web {
 class WebUIIOS;
 }
 
 namespace ios {
 
 // This class is a Chrome-specific extension of the BrowserState interface.
 class ChromeBrowserState : public web::BrowserState {
  public:
-  enum ExitType {
-    EXIT_NORMAL,
-    EXIT_CRASHED,
-  };
-
   ~ChromeBrowserState() override {}
 
   // Returns the ChromeBrowserState corresponding to the given BrowserState.
   static ChromeBrowserState* FromBrowserState(BrowserState* browser_state);
 
   // Returns the ChromeBrowserState corresponding to the given WebUIIOS.
   static ChromeBrowserState* FromWebUIIOS(web::WebUIIOS* web_ui);
 
   // Returns sequenced task runner where browser state dependent I/O
   // operations should be performed.
@@ skipping 19 matching lines @@
   // ChromeBrowserState, if one exists.
   virtual void DestroyOffTheRecordChromeBrowserState() = 0;
 
   // Retrieves a pointer to the PrefService that manages the preferences.
   virtual PrefService* GetPrefs() = 0;
 
   // Retrieves a pointer to the PrefService that manages the preferences as
   // a syncable_prefs::PrefServiceSyncable.
   virtual syncable_prefs::PrefServiceSyncable* GetSyncablePrefs() = 0;
 
-  // Sets the ExitType for the ChromeBrowserState. This may be invoked multiple
-  // times during shutdown; only the first such change (the transition from
-  // EXIT_CRASHED to one of the other values) is written to prefs, any later
-  // calls are ignored.
-  //
-  // NOTE: this is invoked internally on a normal shutdown, but is public so
-  // that it can be invoked to handle backgrounding/foregrounding.
-  virtual void SetExitType(ExitType exit_type) = 0;
-
-  // Returns how the last session was shutdown.
-  virtual ExitType GetLastSessionExitType() = 0;
-
   // Deletes all network related data since |time|. It deletes transport
   // security state since |time| and it also deletes HttpServerProperties data.
   // Works asynchronously, however if the |completion| callback is non-null, it
   // will be posted on the UI thread once the removal process completes.
   // Be aware that theoretically it is possible that |completion| will be
   // invoked after the Profile instance has been destroyed.
   virtual void ClearNetworkingHistorySince(base::Time time,
                                            const base::Closure& completion) = 0;
 
  protected:
   ChromeBrowserState() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserState);
 };
 
 }  // namespace ios
 
 #endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_H_