Update Android Card Unmask prompt to rely on the controller a bit more.

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/strings/string16.h"
 #include "chrome/browser/ui/autofill/card_unmask_prompt_view.h"
 
 namespace autofill {
 
 class CardUnmaskPromptViewAndroid : public CardUnmaskPromptView {
  public:
   explicit CardUnmaskPromptViewAndroid(CardUnmaskPromptController* controller);
 
   void Show();
 
+  bool CheckUserInputValidity(JNIEnv* env, jobject obj, jstring response);
   void OnUserInput(JNIEnv* env, jobject obj, jstring response);
   void PromptDismissed(JNIEnv* env, jobject obj);
 
   // CardUnmaskPromptView implementation.
   void ControllerGone() override;
   void DisableAndWaitForVerification() override;
   void GotVerificationResult(bool success) override;
 
   static bool Register(JNIEnv* env);
 
  private:
   virtual ~CardUnmaskPromptViewAndroid();
 
   // The corresponding java object.
   base::android::ScopedJavaGlobalRef<jobject> java_object_;
 
   CardUnmaskPromptController* controller_;
 
   DISALLOW_COPY_AND_ASSIGN(CardUnmaskPromptViewAndroid);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_ANDROID_AUTOFILL_CARD_UNMASK_PROMPT_VIEW_ANDROID_H_