[iOS][MF] Add insets to password icon

Bug: 878388
Change-Id: I1326cc2cc851efcb8ec4e873f0c6aa62710d30cf
Reviewed-on: https://chromium-review.googlesource.com/c/1344056Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609992}

ios/chrome/browser/ui/autofill/manual_fill/manual_fill_accessory_view_controller.mm

@@ -144,6 +144,7 @@ static NSTimeInterval MFAnimationDuration = 0;
   self.passwordButton.accessibilityIdentifier =
       manual_fill::AccessoryPasswordAccessibilityIdentifier;
   self.passwordButton.hidden = self.isPasswordButtonHidden;
+  self.passwordButton.contentEdgeInsets = UIEdgeInsetsMake(0, 2, 0, 2);
   self.passwordButton.accessibilityLabel =
       l10n_util::GetNSString(IDS_IOS_MANUAL_FALLBACK_SHOW_PASSWORDS);
   [icons addObject:self.passwordButton];