cros: Update saml banner text and style.

BUG=337122

Review URL: https://codereview.chromium.org/137263015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247819 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/chromeos_strings.grdp

@@ -1301,7 +1301,7 @@ Press any key to continue exploring.
     Previous password
   </message>
   <message name="IDS_LOGIN_SAML_NOTICE" desc="Text message displayed above SAML portal to learly indicate that the user is being redirected to another sign-in provider.">
-    You are being redirected below to a sign-in service hosted by <ph name="SAML_DOMAIN">$1<ex>saml.com</ex></ph>.
+    The sign-in service below is hosted by <ph name="SAML_DOMAIN">$1<ex>saml.com</ex></ph>. Sign in to continue.
   </message>
   <message name="IDS_LOGIN_CONFIRM_PASSWORD_TITLE" desc="Title for the confirm password dialog.">
     Please confirm your password.

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

@@ -14,7 +14,7 @@
 }
 
 #gaia-signin.saml {
-  padding: 75px 10px 10px;
+  padding: 75px 0 0;
 }
 
 #signin-right {
@@ -156,9 +156,5 @@
 }
 
 #saml-notice-message {
-  background-color: rgb(250, 245, 202);
-  border: 2px solid rgb(250, 245, 202);
-  border-radius: 2px;
-  margin-left: auto;
-  margin-right: auto;
+  margin: 0 auto;
 }