Cleanup ios/web_view.

ios/web_view/shell/translate_controller.mm

+// 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 "base/mac/scoped_nsobject.h"
+#import "ios/web_view/public/criwv_translate_manager.h"
+
+@interface TranslateController () {
+  base::scoped_nsobject<UIAlertController> _beforeTranslateActionSheet;
+  base::scoped_nsprotocol<id<CRIWVTranslateManager>> _translateManager;
+}
+@end
+
+@implementation TranslateController
+
+- (void)dealloc {
+  [_beforeTranslateActionSheet dismissViewControllerAnimated:YES
+                                                  completion:nil];
+  [super dealloc];
+}
+
+#pragma mark CRIWVTranslateDelegate methods
+
+- (void)translateStepChanged:(ios_web_view::CRIWVTransateStep)step
+                     manager:(id<CRIWVTranslateManager>)manager {
+  if (step == ios_web_view::CRIWVTransateStepBeforeTranslate) {
+    DCHECK(!_translateManager);
+    DCHECK(!_beforeTranslateActionSheet);
+    _translateManager.reset([manager retain]);
+    _beforeTranslateActionSheet.reset([[UIAlertController
+        alertControllerWithTitle:nil
+                         message:@"Translate?"
+                  preferredStyle:UIAlertControllerStyleActionSheet] retain]);
+    UIAlertAction* cancelAction =
+        [UIAlertAction actionWithTitle:@"Nope."
+                                 style:UIAlertActionStyleCancel
+                               handler:^(UIAlertAction* action) {
+                                 DCHECK(_beforeTranslateActionSheet);
+                                 _beforeTranslateActionSheet.reset();
+                                 DCHECK(_translateManager);
+                                 _translateManager.reset();
+                               }];
+    [_beforeTranslateActionSheet addAction:cancelAction];
+
+    UIAlertAction* translateAction =
+        [UIAlertAction actionWithTitle:@"Yes!"
+                                 style:UIAlertActionStyleDefault
+                               handler:^(UIAlertAction* action) {
+                                 DCHECK(_beforeTranslateActionSheet);
+                                 _beforeTranslateActionSheet.reset();
+                                 DCHECK(_translateManager);
+                                 [_translateManager translate];
+                                 _translateManager.reset();
+                               }];
+    [_beforeTranslateActionSheet addAction:translateAction];
+
+    [[UIApplication sharedApplication].keyWindow.rootViewController
+        presentViewController:_beforeTranslateActionSheet
+                     animated:YES
+                   completion:nil];
+  }
+}
+
+@end