NTP4: Add ability to drag links to the apps pages.

chrome/browser/resources/ntp4/new_tab_theme.css

 html,
 .section > h2 span,
 #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;
 }
 
@@ skipping 42 matching lines @@
 
 .section.hidden > h2 .back {
   background: none;
   border-color-top: $$$1; /* COLOR_NTP_SECTION_HEADER_RULE_LIGHT */
 }
 
 .section.hidden:hover > h2 .back {
   border-color-top: $$9; /* COLOR_NTP_SECTION_HEADER_RULE */
 }
 
-.app span {
+.app span,
+.link span {
   color: $8; /* COLOR_NTP_TEXT */
 }
 
 .app:hover > a,
 .app.dragging > a {
   color: $$3; /* COLOR_NTP_SECTION_TEXT */
   background-color: $$1; /* COLOR_NTP_SECTION */;
 }
 
 /* Footer *********************************************************************/
@@ skipping 50 matching lines @@
   background-color: $$2; /* COLOR_NTP_SECTION_BORDER */
 }
 
 .filler .thumbnail {
   border-color: $2; /* COLOR_NTP_BACKGROUND */
 }
 
 .thumbnail-shield {
   background-color: $2; /* COLOR_NTP_BACKGROUND */
 }