components: Cleanup class/struct fwd declarations

chrome/browser/ui/android/autofill/card_unmask_prompt_view_android.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_ANDROID_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_ANDROID_H_
 #define CHROME_BROWSER_UI_ANDROID_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/autofill/core/browser/ui/card_unmask_prompt_view.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace autofill {
 
+class CardUnmaskPromptController;
+
 class CardUnmaskPromptViewAndroid : public CardUnmaskPromptView {
  public:
   explicit CardUnmaskPromptViewAndroid(CardUnmaskPromptController* controller,
                                        content::WebContents* web_contents);
 
   bool CheckUserInputValidity(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jstring>& response);
   void OnUserInput(JNIEnv* env,
@@ skipping 24 matching lines @@
 
   CardUnmaskPromptController* controller_;
   content::WebContents* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(CardUnmaskPromptViewAndroid);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_ANDROID_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_ANDROID_H_