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

chrome/browser/ui/passwords/manage_passwords_view_utils.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_UI_PASSWORDS_MANAGE_PASSWORDS_VIEW_UTILS_H_
 #define CHROME_BROWSER_UI_PASSWORDS_MANAGE_PASSWORDS_VIEW_UTILS_H_
 
 #include <string>
 
 namespace autofill {
 struct PasswordForm;
-}
+}  // namespace autofill
+
+namespace gfx {
+class ImageSkia;
+}  // namespace gfx
+
+// The desired width and height in pixels for an account avatar.
+extern const int kAvatarImageSize;
+
+// Crops and scales |image_skia| to the desired size for an account avatar.
+gfx::ImageSkia ScaleImageForAccountAvatar(gfx::ImageSkia image_skia);
 
 // Returns the origin URI in a format which can be presented to a user based of
 // |password_from| field values. For web URIs |languages| is using in order to
 // determine whether a URI is 'comprehensible' to a user who understands
 // languages listed.
 std::string GetHumanReadableOrigin(const autofill::PasswordForm& password_form,
                                    const std::string& languages);
 
 #endif  // CHROME_BROWSER_UI_PASSWORDS_MANAGE_PASSWORDS_VIEW_UTILS_H_