Don't allow connection to networks that are not connected....

chrome/browser/resources/options/chromeos_internet_options_page.css

 /*
  * TODO(xiyuan): Remove the section overrides when options_page.css uses the
  * new style.
  */
 #inetTitle {
   border: none;
 }
 
 #internetPage > section {
   display: block;
@@ skipping 29 matching lines @@
 
 .network-item {
   -webkit-box-align: center;
   -webkit-padding-start: 30px;
   border: 1px solid rgba(255,255,255,0); /* transparent white */
   border-radius: 2px;
   display: -webkit-box;
   height: 35px;
 }
 
-.network-item:hover {
+.network-item[connectable]:hover {

[xiyuan, 2010/11/16 23:52:18]

What style will be used for non-connectable network?

   border-color: hsl(214, 91%, 85%);
   background-color: hsl(214, 91%, 97%);
 }
 
 .network-item[connected] {
   background-image: -webkit-gradient(linear, left top, left bottom,
       from(rgba(255,255,255,0.8)), to(rgba(255,255,255,0)));
   background-color: hsl(214,91%,89%);
   border-color: hsl(214, 91%, 65%);
 }
@@ skipping 101 matching lines @@
 #detailsInternetPage[cert] .password-details,
 #detailsInternetPage[certPkcs] .password-details,
 #detailsInternetPage:not([cert]) .cert-details,
 #detailsInternetPage:not([certPkcs]) .cert-pkcs-details {
   display: none;
 }
 
 #wirelessButtons > * > button {
   margin-left: 5px;
 }