Export vendor capabilities to the CJT ticket.

chrome/browser/resources/print_preview/common/overlay.js

Index: chrome/browser/resources/print_preview/common/overlay.js
diff --git a/chrome/browser/resources/print_preview/common/overlay.js b/chrome/browser/resources/print_preview/common/overlay.js
index cb24bcc6f3c1f198a112c20ae7f869baf0502048..4585dd64ae13a19e50a4addfae28fbac4cc04a78 100644
--- a/chrome/browser/resources/print_preview/common/overlay.js
+++ b/chrome/browser/resources/print_preview/common/overlay.js
@@ -40,11 +40,21 @@ cr.define('print_preview', function() {
 
       this.getElement().addEventListener('keydown', function f(e) {
         // Escape pressed -> cancel the dialog.
-        if (e.keyCode == 27 && !e.shiftKey && !e.ctrlKey && !e.altKey &&
-            !e.metaKey) {
-          e.stopPropagation();
-          e.preventDefault();
-          this.cancel();
+        if (!e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
+          if (e.keyCode == 27) {
+            e.stopPropagation();
+            e.preventDefault();
+            this.cancel();
+          } else if (e.keyCode == 13) {
+            var activeElementTag = document.activeElement ?
+                document.activeElement.tagName.toUpperCase() : '';
+            if (activeElementTag != 'BUTTON' && activeElementTag != 'SELECT') {
+              if (this.onEnterPressedInternal()) {
+                e.stopPropagation();
+                e.preventDefault();
+              }
+            }
+          }
         }
       }.bind(this));
 
@@ -97,6 +107,14 @@ cr.define('print_preview', function() {
     onCancelInternal: function() {},
 
     /**
+     * @return {boolean} Whether the event was handled.
+     * @protected
+     */
+    onEnterPressedInternal: function() {
+      return false;
+    },
+
+    /**
      * Called when the overlay is clicked. Pulses the page.
      * @param {Event} e Contains the element that was clicked.
      * @private