MD Settings: Make Escape blur and undo changes to input fields.

chrome/browser/resources/settings/controls/settings_input.js

Index: chrome/browser/resources/settings/controls/settings_input.js
diff --git a/chrome/browser/resources/settings/controls/settings_input.js b/chrome/browser/resources/settings/controls/settings_input.js
index 2b39de17ee3aca1f497743fe5ef522a82f8d7bee..ea075476fe84ae7cda2a7d7c44a5a93eb1072565 100644
--- a/chrome/browser/resources/settings/controls/settings_input.js
+++ b/chrome/browser/resources/settings/controls/settings_input.js
@@ -70,6 +70,11 @@ Polymer({
     if (this.$.input.focused)
       return;
 
+    this.setInputValueFromPref_();
+  },
+
+  /** @private */
+  setInputValueFromPref_: function() {
     if (this.pref.type == chrome.settingsPrivate.PrefType.NUMBER) {
       this.value = this.pref.value.toString();
     } else {
@@ -118,6 +123,19 @@ Polymer({
   },
 
   /**
+   * Handler for profile name keydowns.
+   * @param {!Event} event
+   * @private
+   */
+  onKeydown_: function(event) {
+    if (event.key != 'Escape')
+      return;
+
+    this.setInputValueFromPref_();
+    this.$.input.blur();
+  },
+
+  /**
    * @param {boolean} disabled
    * @return {boolean} Whether the element should be disabled.
    * @private