Convert ios_web_view_shell to pure Objective-C.

ios/web_view/shell/translate_controller.m

 // Copyright 2014 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.
 
 #import "ios/web_view/shell/translate_controller.h"
 
 #import <UIKit/UIKit.h>
 
-#include "base/logging.h"
 #import "ios/web_view/public/criwv_translate_manager.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @interface TranslateController ()
 // Action Sheet to prompt user whether or not the page should be translated.
-@property (nonatomic, strong) UIAlertController* beforeTranslateActionSheet;
+@property(nonatomic, strong) UIAlertController* beforeTranslateActionSheet;
 // Manager which performs the translation of the content.
-@property (nonatomic, strong) id<CRIWVTranslateManager> translateManager;
+@property(nonatomic, strong) id<CRIWVTranslateManager> translateManager;
 @end
 
 @implementation TranslateController
 
 @synthesize beforeTranslateActionSheet = _beforeTranslateActionSheet;
 @synthesize translateManager = _translateManager;
 
 - (void)dealloc {
   [_beforeTranslateActionSheet dismissViewControllerAnimated:YES
                                                   completion:nil];
 }
 
 #pragma mark CRIWVTranslateDelegate methods
 
 - (void)translateStepChanged:(CRIWVTransateStep)step
                      manager:(id<CRIWVTranslateManager>)manager {
   if (step == CRIWVTransateStepBeforeTranslate) {
-    DCHECK(!_translateManager);
-    DCHECK(!_beforeTranslateActionSheet);
     self.translateManager = manager;
     self.beforeTranslateActionSheet = [UIAlertController
         alertControllerWithTitle:nil
                          message:@"Translate?"
                   preferredStyle:UIAlertControllerStyleActionSheet];
     UIAlertAction* cancelAction =
         [UIAlertAction actionWithTitle:@"Nope."
                                  style:UIAlertActionStyleCancel
                                handler:^(UIAlertAction* action) {
-                                 DCHECK(_beforeTranslateActionSheet);
                                  self.beforeTranslateActionSheet = nil;
-                                 DCHECK(_translateManager);
                                  self.translateManager = nil;
                                }];
     [_beforeTranslateActionSheet addAction:cancelAction];
 
     UIAlertAction* translateAction =
         [UIAlertAction actionWithTitle:@"Yes!"
                                  style:UIAlertActionStyleDefault
                                handler:^(UIAlertAction* action) {
-                                 DCHECK(_beforeTranslateActionSheet);
                                  self.beforeTranslateActionSheet = nil;
-                                 DCHECK(_translateManager);
                                  [_translateManager translate];
                                  self.translateManager = nil;
                                }];
     [_beforeTranslateActionSheet addAction:translateAction];
 
     [[UIApplication sharedApplication].keyWindow.rootViewController
         presentViewController:_beforeTranslateActionSheet
                      animated:YES
                    completion:nil];
   }
 }
 
 @end