components: Cleanup class/struct fwd declarations

chrome/browser/ui/cocoa/autofill/card_unmask_prompt_view_bridge.h

 // Copyright (c) 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_COCOA_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_BRIDGE_H_
 #define CHROME_BROWSER_UI_COCOA_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_BRIDGE_H_
 
 #include <memory>
 
 #include "base/mac/scoped_nsobject.h"
 #include "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
 #include "components/autofill/core/browser/ui/card_unmask_prompt_view.h"
 
 namespace content {
 class WebContents;
 }
 
 @class CardUnmaskPromptViewCocoa;
 
 namespace autofill {
 
+class CardUnmaskPromptController;
+
 class CardUnmaskPromptViewBridge : public CardUnmaskPromptView,
                                    public ConstrainedWindowMacDelegate {
  public:
   explicit CardUnmaskPromptViewBridge(CardUnmaskPromptController* controller,
                                       content::WebContents* web_contents);
   ~CardUnmaskPromptViewBridge() override;
 
   // CardUnmaskPromptView implementation:
   void Show() override;
   void ControllerGone() override;
@@ skipping 29 matching lines @@
 - (id)initWithBridge:(autofill::CardUnmaskPromptViewBridge*)bridge;
 
 - (void)setProgressOverlayText:(const base::string16&)text
                    showSpinner:(BOOL)showSpinner;
 - (void)setRetriableErrorMessage:(const base::string16&)text;
 - (void)setPermanentErrorMessage:(const base::string16&)text;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_BRIDGE_H_