Cleanup ios/web_view.

ios/web_view/internal/translate/criwv_translate_manager_impl.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/internal/translate/criwv_translate_manager_impl.h"
+
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "components/translate/core/browser/translate_manager.h"
+#include "components/translate/core/browser/translate_ui_delegate.h"
+
+@implementation CRIWVTranslateManagerImpl {
+  std::unique_ptr<translate::TranslateUIDelegate> _translateUIDelegate;
+}
+
+- (instancetype)initWithTranslateManager:(translate::TranslateManager*)manager
+                          sourceLanguage:(const std::string&)source
+                          targetLanguage:(const std::string&)target {
+  if ((self = [super init])) {
+    DCHECK(manager);
+    _translateUIDelegate = base::MakeUnique<translate::TranslateUIDelegate>(
+        manager->GetWeakPtr(), source, target);
+  }
+  return self;
+}
+
+#pragma mark CRIWVTranslateManager methods
+
+- (void)translate {
+  _translateUIDelegate->Translate();
+}
+
+- (void)revertTranslation {
+  _translateUIDelegate->RevertTranslation();
+}
+
+@end