[ChromeOS] Reland - Make WebUI login use only needed resources.

chrome/browser/resources/chromeos/login/oobe.css

Index: chrome/browser/resources/chromeos/login/oobe.css
diff --git a/chrome/browser/resources/chromeos/login/oobe.css b/chrome/browser/resources/chromeos/login/oobe.css
index 04ac1ede893086d38c9359da4a73c5a3eaaf28a9..2f597fd64e20c9da670f0d047121bd85342cdc03 100644
--- a/chrome/browser/resources/chromeos/login/oobe.css
+++ b/chrome/browser/resources/chromeos/login/oobe.css
@@ -614,53 +614,7 @@ button {
   -webkit-transition: 0.25s opacity;
 }
 
-#login-header-bar {
-  padding: 5px 8px;
-}
-
-#login-header-bar button,
-#login-header-bar button:active,
-#login-header-bar button:focus,
-#login-header-bar button:hover {
-  -webkit-box-shadow: none;
-  background: transparent none;
-  border: 0;
-  color: #666;
-  cursor: pointer;
-  height: 24px;
-  margin: 0;
-  min-width: 0;
-  padding: 0;
-  vertical-align: middle;
-}
-
-.header-bar-item {
-  -webkit-padding-start: 15px;
-  background-image: url('chrome://theme/IDR_DIVIDER_VERT');
-  background-position: left center;
-  background-repeat: no-repeat;
-  display: inline-block;
-  height: 24px;
-}
-
-#login-header-bar #shutdown-button {
-  -webkit-padding-start: 24px;
-  background-image: url('chrome://theme/IDR_ICON_POWER20');
-  background-position: left center;
-  background-repeat: no-repeat;
-}
-
-#login-header-bar #add-user-button {
-  -webkit-padding-start: 24px;
-  background-image: url('chrome://theme/IDR_ICON_ADD_USER20');
-  background-position: left center;
-  background-repeat: no-repeat;
-}
-
-html[dir=rtl] .header-bar-item,
-html[dir=rtl] #header,
-html[dir=rtl] #login-header-bar #shutdown-button,
-html[dir=rtl] #login-header-bar #add-user-button {
+html[dir=rtl] #header {
   background-position: right center;
 }