PrintPreview: Hide/Show the header footer option based on print frame margins.

chrome/browser/resources/print_preview/margin_settings.js

Index: chrome/browser/resources/print_preview/margin_settings.js
diff --git a/chrome/browser/resources/print_preview/margin_settings.js b/chrome/browser/resources/print_preview/margin_settings.js
index 9faa640475bc6399a5151a9ba0065cdc6e19b7dd..0ffca9f9e8858b05123d023c422d4ed555481e94 100644
--- a/chrome/browser/resources/print_preview/margin_settings.js
+++ b/chrome/browser/resources/print_preview/margin_settings.js
@@ -240,13 +240,6 @@ cr.define('print_preview', function() {
         this.customMargins_ = new Margins(-1, -1, -1 , -1);
         this.customMargins = lastUsedMarginsSettings;
       }
-      this.dispatchMarginsChangedEvent_();
-    },
-
-    dispatchMarginsChangedEvent_: function() {
-      var customEvent = cr.Event(customEvents.MARGINS_SELECTION_CHANGED);
-      customEvent.selectedMargins = this.selectedMarginsValue;
-      document.dispatchEvent(customEvent);
     },
 
     /**
@@ -567,8 +560,6 @@ cr.define('print_preview', function() {
      * @private
      */
     onMarginsChanged_: function() {
-      this.dispatchMarginsChangedEvent_();
-
       if (this.isDefaultMarginsSelected() || this.isMinimumMarginsSelected() ||
           this.isNoMarginsSelected())
         this.onDefaultMinimumNoMarginsSelected_();