Add reset all button to flags page

chrome/browser/resources/flags.js

Index: chrome/browser/resources/flags.js
diff --git a/chrome/browser/resources/flags.js b/chrome/browser/resources/flags.js
index a819b86485129ebd5c3a143e6d5a99154328d388..0bcfa2b03bbf90cd20894a57577177f2dc3ee44b 100644
--- a/chrome/browser/resources/flags.js
+++ b/chrome/browser/resources/flags.js
@@ -49,6 +49,8 @@ function renderTemplate(flagsExperimentsData) {
   for (var i = 0; i < elements.length; ++i) {
     elements[i].onclick = restartBrowser;
   }
+
+  $('experiment-reset-all').onclick = resetAllFlags;
 }
 
 /**
@@ -68,6 +70,15 @@ function restartBrowser() {
 }
 
 /**
+ * Reset all flags to their default values and refresh the UI.
+ */
+function resetAllFlags() {
+  // Asks the C++ FlagsDOMHandler to reset all flags to default values.
+  chrome.send('resetAllFlags');
+  requestFlagsExperimentsData();
+}
+
+/**
  * Called by the WebUI to re-populate the page with data representing the
  * current state of installed experiments.
  * @param {Object} flagsExperimentsData Information about available experiments