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..b0caa6430c29a828f3cd53846d080cea625a0355 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
@@ -1074,6 +1081,16 @@ SuggestionsBox.prototype = {
   },
 
   /**
+   * Clears the selected suggestion.
+   */
+  clearSelection: function() {
+    this.selectedIndex_ = -1;
+    var oldSelection = this.container_.querySelector('.' + CLASSES.SELECTED);
+    if (oldSelection)
+      oldSelection.classList.remove(CLASSES.SELECTED);
+  },
+
+  /**
    * Changes the current selected suggestion index.
    * @param {number} index The new selection to suggest.
    * @private
@@ -1153,6 +1170,13 @@ SuggestionsBox.prototype = {
   },
 
   /**
+   * Returns the selected suggestion index.
+   */
+  selectedIndex: function() {
+    return this.selectedIndex_;
+  },
+
+  /**
    * Redraws the mouse hover background.
    * @private
    */
@@ -1321,6 +1345,15 @@ function handleKeyPress(e) {
     case KEY_DOWN_ARROW:
       activeBox.selectNext();
       break;
+    case KEY_ESC:
+      if (activeBox.selectedIndex() != -1) {
+        activeBox.clearSelection();
+      } else {
+        hideActiveSuggestions();
+        document.body.classList.remove(CLASSES.HIDE_NTP);
+        onThemeChange();
+      }
+      break;
   }
 }