Extract some account chooser views things for cross-platform use.

chrome/browser/ui/views/passwords/credentials_item_view.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_VIEWS_PASSWORDS_CREDENTIALS_ITEM_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_PASSWORDS_CREDENTIALS_ITEM_VIEW_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/ui/passwords/account_avatar_fetcher.h"
 #include "components/autofill/core/common/password_form.h"
 #include "components/password_manager/content/common/credential_manager_types.h"
 #include "ui/views/controls/button/label_button.h"
 
 namespace gfx {
 class ImageSkia;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace views {
 class ImageView;
 class Label;
 }
 
 // CredentialsItemView represents a credential view in the account chooser
 // bubble.
-class CredentialsItemView : public views::LabelButton {
+class CredentialsItemView : public AccountAvatarFetcherDelegate,
+                            public views::LabelButton {
  public:
   CredentialsItemView(views::ButtonListener* button_listener,
                       const autofill::PasswordForm& form,
                       password_manager::CredentialType credential_type,
                       net::URLRequestContextGetter* request_context);
   ~CredentialsItemView() override;
 
   const autofill::PasswordForm& form() const { return form_; }
   password_manager::CredentialType credential_type() const {
     return credential_type_;
   }
 
+  // AccountAvatarFetcherDelegate:
+  void UpdateAvatar(const gfx::ImageSkia& image) override;
+
  private:
-  class AvatarFetcher;
-
   // views::LabelButton:
   gfx::Size GetPreferredSize() const override;
   int GetHeightForWidth(int w) const override;
   void Layout() override;
 
-  void UpdateAvatar(const gfx::ImageSkia& image);
-
   autofill::PasswordForm form_;
   password_manager::CredentialType credential_type_;
 
   views::ImageView* image_view_;
   views::Label* full_name_label_;
   views::Label* username_label_;
 
   base::WeakPtrFactory<CredentialsItemView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CredentialsItemView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PASSWORDS_CREDENTIALS_ITEM_VIEW_H_