ntp4: some appearance fixes

chrome/browser/resources/ntp4/new_tab_theme.css

 html,
 #most-visited-settings {
   background-attachment: fixed;
   background-color: $2; /* COLOR_NTP_BACKGROUND */
   background-image: url(chrome://theme/IDR_THEME_NTP_BACKGROUND?$1);
   background-position: $3;
   background-repeat: $5;
 }
 
 body {
@@ skipping 12 matching lines @@
 
 .link-color {
   color: $9; /* COLOR_NTP_LINK */
 }
 
 .app span,
 .link span {
   color: $8; /* COLOR_NTP_TEXT */
 }
 
-.app:hover > a,
-.app.dragging > a {
-  color: $12; /* COLOR_NTP_SECTION_TEXT */
-  background-color: $10; /* COLOR_NTP_SECTION */;
-}
-
 .tile-page-scrollbar {
   background-color: $21; /* COLOR_NTP_TEXT_LIGHT */
 }
 
 /* Footer *********************************************************************/
 
 #footer-border {
   background: -webkit-linear-gradient(left,
       rgba($22, 0.2), /* COLOR_NTP_SECTION_BORDER */
       rgba($22, 0.3) 20%, /* COLOR_NTP_SECTION_BORDER */
       rgba($22, 0.3) 80%, /* COLOR_NTP_SECTION_BORDER */
       rgba($22, 0.2)); /* COLOR_NTP_SECTION_BORDER */
 }
 
 .dot input:focus {
   background-color: $2; /* COLOR_NTP_BACKGROUND */
 }
 
-.tile-page-title,
-#footer-content span {
-  color: $21; /* COLOR_NTP_TEXT_LIGHT */
-}
-
-.disclosure-triangle {
-  background-color: $8 /* COLOR_NTP_TEXT */
-}
-
 /* Bookmarks ******************************************************************/
 
 .bookmark,
 .bookmark > .title {
   color: $8; /* COLOR_NTP_TEXT */
 }
 
 /* Most Visited ***************************************************************/
 
 .most-visited,
@@ skipping 13 matching lines @@
 }
 
 .thumbnail-wrapper {
   /* This shows through at the (rounded) thumbnail's corners. */
   background-color: $11; /* COLOR_NTP_SECTION_BORDER */
 }
 
 .filler .thumbnail {
   border-color: $2; /* COLOR_NTP_BACKGROUND */
 }