Handle Esc key press event in Local NTP.

chrome/browser/resources/local_ntp/local_ntp.js

Index: chrome/browser/resources/local_ntp/local_ntp.js
diff --git a/chrome/browser/resources/local_ntp/local_ntp.js b/chrome/browser/resources/local_ntp/local_ntp.js
index 43b0f717ac4c5173b699fbb2499c33b1a5fba58a..cfe4770b703c304ea4c33f588a6109464bb7c59d 100644
--- a/chrome/browser/resources/local_ntp/local_ntp.js
+++ b/chrome/browser/resources/local_ntp/local_ntp.js
@@ -648,6 +648,13 @@ var KEY_UP_ARROW = 38;
 var KEY_DOWN_ARROW = 40;
 
 /**
+ * "Esc" keycode.
+ * @type {number}
+ * @const
+ */
+var KEY_ESC = 27;
+
+/**
  * Pixels of padding inside a suggestion div for displaying its icon.
  * @type {number}
  * @const
@@ -1311,15 +1318,19 @@ function setSuggestionStyles() {
  * @param {Object} e The key being pressed.
  */
 function handleKeyPress(e) {
-  if (!activeBox)
-    return;
-
   switch (e.keyCode) {
     case KEY_UP_ARROW:
-      activeBox.selectPrevious();
+      if (activeBox)
+        activeBox.selectPrevious();
       break;
     case KEY_DOWN_ARROW:
-      activeBox.selectNext();
+      if (activeBox)
+        activeBox.selectNext();
+      break;
+    case KEY_ESC:
+      hideActiveSuggestions();

[samarth, 2013/05/04 01:04:17]

There are two cases here too :)
1) You type something and hit escape.  That works
2) You type something, arrow down and then hit escape.

#2 should only reset the selection state and not close the dropdown.

[kmadhusu, 2013/05/04 03:34:38]

Done.

+      document.body.classList.remove(CLASSES.HIDE_NTP);
+      onThemeChange();

[samarth, 2013/05/04 01:04:17]

Not sure if this is the right way to go back to the NTP. I'll defer to Jeremy
for that.

[kmadhusu, 2013/05/04 03:34:38]

This call reloads the background theme if one exists. We actually show the NTP
by removing the HIDE_NTP class.

       break;
   }
 }