ChromeOS GAIA: Fixed size for close and back buttons on signin and enrollment screens

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

Index: chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment_webview.css
diff --git a/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment_webview.css b/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment_webview.css
index de07cb935204ed891a0410101c4f70d289b19f7c..b82ed7cf96044d79b496f42262907416dc4ae0d9 100644
--- a/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment_webview.css
+++ b/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment_webview.css
@@ -137,20 +137,12 @@
 }
 
 #oauth-enroll-cancel-button {
-  background: transparent none;
   background-image: url(chrome://theme/IDR_LOGIN_CLOSE_BUTTTON);
-  background-position: center;
-  background-repeat: no-repeat;
-  height: 14px;
-  position: absolute;
-  right: 15px;
-  top: 15px;
-  width: 14px;
-  z-index: 1;
+  right: 0;
 }
 
 html[dir=rtl] #oauth-enroll-cancel-button {
-  left: 15px;
+  left: 0;
   right: auto;
 }
 
@@ -163,22 +155,14 @@ html[dir=rtl] #oauth-enroll-cancel-button {
 }
 
 #oauth-enroll-back-button {
-  background: transparent none;
   background-image: url(chrome://theme/IDR_LOGIN_BACK_BUTTTON);
-  background-position: center;
-  background-repeat: no-repeat;
-  height: 18px;
-  left: 14px;
-  position: absolute;
-  top: 14px;
-  width: 18px;
-  z-index: 1;
+  left: 0;
 }
 
 html[dir=rtl] #oauth-enroll-back-button {
   -webkit-transform: scaleX(-1);
   left: auto;
-  right: 14px;
+  right: 0;
 }
 
 #oauth-enrollment.saml #oauth-enroll-back-button {