Update the web store promo to be clearer and configurable at run-time.

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 124 matching lines @@
 
 menu > button.default {
   font-weight: bold;
 }
 
 #apps-promo {
   display: none;
 }
 
 html.apps-promo-visible #apps-promo {
-  display: block;
+  background: url('chrome://theme/IDR_WEBSTORE_ICON') no-repeat;
+  height: 125px;
+  -webkit-padding-start: 125px;
+  display: table-cell;
+  vertical-align: text-bottom;
 }
 
-#apps-promo > h3 {
-  font-size: 16px;
-  margin-top: 1em;
-  margin-bottom: 0.25em;
-}
-
-#apps-promo-text1 {
-  margin-top: 0;
+#apps-promo-heading {
+  font-size: 115%;
+  font-weight: bold;
+  margin-bottom: 5px;
+  -webkit-margin-start: 3px;
 }
 
 #apps-promo-hide {
-  float: right;
   -webkit-appearance: none;
   -webkit-transition: opacity .15s;
   background-color: transparent;
   border: 0;
   cursor: pointer;
   font-family: inherit;
   font-size: 90%;
   text-decoration: underline;
+  margin-top: 2px;
 }
 
 html[dir=rtl] #apps-promo-hide {
   float: left;
 }
 
-html.apps-promo-visible .app.web-store-entry {
-  position: absolute;
-  left: 100%;
-  top: 0;
-  -webkit-margin-start: 22px;
-}
-
-html.apps-promo-visible[dir=rtl] .app.web-store-entry {
-  right: 100%;
-}
-
-html.apps-promo-visible .app.web-store-entry a {
-  font-weight: bold;
-}
-
 /*
 We position the web store entry all by its lonesome in the top of the rightmost
 column when there is at least one full row of apps. Note that this is similar,
 but different than its position during promo (html.apps-promo-visible), so we
 never set .loner while the promo is running.
 */
 .app.web-store-entry.loner {
   position: absolute;
   left: 100%;
   top: 0;
 }
 
 html[dir=rtl] .app.web-store-entry.loner {
   right: 100%;
 }
+
+/* g-button CSS styles (see go/buttons) */
+@media screen, projection {
+  g-button-basic * {
+    margin: 0;
+    padding: 0;
+  }
+
+  .g-button-basic {
+    direction: ltr;
+    line-height: 1.2;
+    width: 20em;
+    max-width: 795px;
+    background-color: #cadef4;
+    border: 1px solid #ccc;
+    padding: 15px;
+    text-align: center;
+    overflow: visible;
+  }
+
+  .g-button-basic div {
+    font-size: 1.3em;
+    background: url('g-button-chocobo-basic-1.png') no-repeat;
+    background-color: #5679a5;
+  }
+
+  .g-button-basic div span span a {
+    display: block;
+    color: #fff!important;
+    background: url('g-button-chocobo-basic-2.png') no-repeat right bottom;
+    padding: 8px 18px 13px 13px;
+    text-decoration: none;
+    font-weight: bold;
+  }
+
+  .g-button-basic div span {
+    display: block;
+    background: url('g-button-chocobo-basic-1.png') no-repeat right -400px;
+    height: 1%;
+  }
+  
+  .g-button-basic p {
+    text-align: center;
+    margin: 10px 0 0;
+  }
+  
+  .g-button-basic {
+    padding: 0;
+    background: none;
+    border: 0;
+  }
+
+  .g-button-basic div span span {
+    background: url('g-button-chocobo-basic-1.png') no-repeat left bottom;
+  }
+}