chrome: Cleanup class/struct forward declarations

chrome/browser/password_manager/account_chooser_dialog_android.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_PASSWORD_MANAGER_ACCOUNT_CHOOSER_DIALOG_ANDROID_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_ACCOUNT_CHOOSER_DIALOG_ANDROID_H_
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/macros.h"
 #include "chrome/browser/ui/passwords/manage_passwords_state.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 class WebContents;
 }
 
-namespace password_manager {
-struct CredentialInfo;
-}
-
 // Native counterpart for the android dialog which allows users to select
 // credentials which will be passed to the web site in order to log in the user.
 class AccountChooserDialogAndroid : public content::WebContentsObserver {
  public:
   AccountChooserDialogAndroid(
       content::WebContents* web_contents,
       std::vector<std::unique_ptr<autofill::PasswordForm>> local_credentials,
       std::vector<std::unique_ptr<autofill::PasswordForm>> federation_providers,
       const GURL& origin,
       const ManagePasswordsState::CredentialsCallback& callback);
@@ skipping 40 matching lines @@
   GURL origin_;
   base::android::ScopedJavaGlobalRef<jobject> dialog_jobject_;
 
   DISALLOW_COPY_AND_ASSIGN(AccountChooserDialogAndroid);
 };
 
 // Native JNI methods
 bool RegisterAccountChooserDialogAndroid(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_ACCOUNT_CHOOSER_DIALOG_ANDROID_H_