Always use vector icons for desktop infobars (when one is defined).

chrome/app/theme/theme_resources.grd

Index: chrome/app/theme/theme_resources.grd
diff --git a/chrome/app/theme/theme_resources.grd b/chrome/app/theme/theme_resources.grd
index 03c6fe33efd806afd1469e1788749c44a20cc58d..ad7c226c09b7510d50bcd06f93a8959111e3838a 100644
--- a/chrome/app/theme/theme_resources.grd
+++ b/chrome/app/theme/theme_resources.grd
@@ -290,7 +290,9 @@
       <structure type="chrome_scaled_image" name="IDR_INFOBAR_PLUGIN_CRASHED" file="common/infobar_plugin_crashed.png" />
       <structure type="chrome_scaled_image" name="IDR_INFOBAR_PLUGIN_INSTALL" file="common/infobar_plugin_install.png" />
       <structure type="chrome_scaled_image" name="IDR_INFOBAR_RESTORE_SESSION" file="common/infobar_restore_session.png" />
-      <structure type="chrome_scaled_image" name="IDR_INFOBAR_SAVE_PASSWORD" file="common/infobar_save_password.png" />
+      <if expr="is_android">
+        <structure type="chrome_scaled_image" name="IDR_INFOBAR_SAVE_PASSWORD" file="common/infobar_save_password.png" />
+      </if>
       <structure type="chrome_scaled_image" name="IDR_INFOBAR_THEME" file="common/infobar_theme.png" />
       <if expr="is_macosx or is_android">
         <structure type="chrome_scaled_image" name="IDR_INFOBAR_TRANSLATE" file="common/infobar_translate.png" />