Polish the new tab notification code a bit, as per request in last review (style changes).

chrome/browser/resources/ntp/apps.css

 /* Apps */
 
 #apps-content {
   position: relative;
   max-width: 780px;  /* (124 + margin * 2) * 6 */
 }
 
 html.apps-promo-visible #apps-content {
   max-width: 650px; /* (124 + margin * 2) * 5 */
 }
@@ skipping 89 matching lines @@
 
 .app_notification {
   color: gray;
   display: block;
   -webkit-transition: color .15s linear;
 }
 .app_notification:hover {
   color: Blue;
 }
 
-.app-notification-close {
+#app-notification-close {
   height: 14px;
   position: absolute;
   right: 6px;
   top: 6px;
   width: 14px;
 }
 
 #apps-content[launcher-animations=true] .app {
   -webkit-transition: top .2s, left .2s, right .2s, opacity .2s;
 }
@@ skipping 95 matching lines @@
   padding: 2px 10px;
   white-space: nowrap;
 }
 
 .notification-bubble {
   background-color: White;
   border: 1px solid #B5B5B5;
   font-family: Helvetica, Arial, sans-serif;
   font-size : 107%;
   min-height: 100px;
-  min-width: 200px;  
   opacity: 0;
   padding: 10px;
   position: absolute;
   width: 200px;
   -webkit-border-radius: 5px;
   -webkit-box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.2);
   -webkit-transition: opacity 0.2s linear;
 }
 .notification-bubble:focus {
   outline: none;
 }
 
 .notification-bubble-opened {
   opacity: 1;
   pointer-events: auto;
 }
 .notification-bubble-closed {
   opacity: 0;
   pointer-events: none;
 }
 
-/* A content-less div with this setting, will create an arrow when coupled
-   with the arrow_* styles below it. */
+div#arrow-container {
+  position: absolute;
+  -webkit-transition: opacity 0.2s linear;
+}
+/* The following arrow class (div.arrow) creates a triangle when used in
+   conjunction with the next three div styles below it (arrow-contents,
+   shadow and border). The border-color property determines which direction
+   the arrow is facing. */
 div.arrow {
   border-style: solid;
   border-width: 12px;
   height: 0px;

[Evan Stade, 2011/08/11 17:08:30]

0 (no px)

   width: 0px;
+}
+div#arrow-contents {
+  border-color: transparent white transparent transparent;
+  z-index: 2;

[Evan Stade, 2011/08/11 17:08:30]

alphabetical

+  padding-left: 3px;
   position: absolute;
 }
-div.arrow-contents {
-  border-color: transparent white transparent transparent;
-  z-index: 2;
-  -webkit-transition: opacity 0.2s linear;
+div#arrow-shadow {
+  border-color: transparent #B5B5B5 transparent transparent;
+  opacity: 0.5;
+  padding-left: 1px;
+  position: absolute;
 }
-div.arrow-shadow {
-  border-color: transparent gray transparent transparent;
-  -webkit-transition: opacity 0.2s linear;
-}
-div.arrow-border {
+div#arrow-border {
   border-color: transparent #B5B5B5 transparent transparent;
   z-index: 1;
-  -webkit-transition: opacity 0.2s linear;
+  padding-left: 2px;
+  position: absolute;  
 }