components: Cleanup class/struct fwd declarations

chrome/browser/ui/views/autofill/card_unmask_prompt_views.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 CHROME_BROWSER_UI_VIEWS_AUTOFILL_CARD_UNMASK_PROMPT_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_AUTOFILL_CARD_UNMASK_PROMPT_VIEWS_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 14 matching lines @@
 class Checkbox;
 class ImageView;
 class Label;
 class Link;
 class Textfield;
 class Throbber;
 }
 
 namespace autofill {
 
+class CardUnmaskPromptController;
+
 class CardUnmaskPromptViews : public CardUnmaskPromptView,
                               public views::ComboboxListener,
                               public views::DialogDelegateView,
                               public views::TextfieldController,
                               public views::LinkListener,
                               public gfx::AnimationDelegate {
  public:
   CardUnmaskPromptViews(CardUnmaskPromptController* controller,
                         content::WebContents* web_contents);
   ~CardUnmaskPromptViews() override;
@@ skipping 113 matching lines @@
   gfx::SlideAnimation overlay_animation_;
 
   base::WeakPtrFactory<CardUnmaskPromptViews> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CardUnmaskPromptViews);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_CARD_UNMASK_PROMPT_VIEWS_H_