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

chrome/browser/ui/passwords/manage_passwords_view_utils.h

Index: chrome/browser/ui/passwords/manage_passwords_view_utils.h
diff --git a/chrome/browser/ui/passwords/manage_passwords_view_utils.h b/chrome/browser/ui/passwords/manage_passwords_view_utils.h
index 9f92fa9884bca4030025181dc813f7bb43a1d935..a05ebe9fd62171873342c7aa12b844373abce8d6 100644
--- a/chrome/browser/ui/passwords/manage_passwords_view_utils.h
+++ b/chrome/browser/ui/passwords/manage_passwords_view_utils.h
@@ -9,7 +9,17 @@
 
 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