Replace net-internals/export tab with deprecation msg and button to show old UI.

chrome/browser/resources/net_internals/export_view.js

Index: chrome/browser/resources/net_internals/export_view.js
diff --git a/chrome/browser/resources/net_internals/export_view.js b/chrome/browser/resources/net_internals/export_view.js
index 7732e23dc0664dc380a07b446484a0915e968bb7..f44bd1898108831e5dc8cb6a0055679cef344fa3 100644
--- a/chrome/browser/resources/net_internals/export_view.js
+++ b/chrome/browser/resources/net_internals/export_view.js
@@ -20,6 +20,11 @@ var ExportView = (function() {
     // Call superclass's constructor.
     superClass.call(this, ExportView.MAIN_BOX_ID);
 
+    this.deprecatedNoticeUI_ = $(ExportView.DEPRECATED_NOTICE_UI_ID);
+    this.showDeprecatedUIButton_ = $(ExportView.SHOW_DEPRECATED_UI_BUTTON_ID);
+    this.showDeprecatedUIButton_.onclick = this.onShowDeprecatedUI_.bind(this);
+    this.deprecatedExportUI_ = $(ExportView.DEPRECATED_EXPORT_UI_ID);
+
     var privacyStrippingCheckbox = $(ExportView.PRIVACY_STRIPPING_CHECKBOX_ID);
     privacyStrippingCheckbox.onclick =
         this.onSetPrivacyStripping_.bind(this, privacyStrippingCheckbox);
@@ -46,6 +51,10 @@ var ExportView = (function() {
   ExportView.TAB_HASH = '#export';
 
   // IDs for special HTML elements in export_view.html
+  ExportView.DEPRECATED_NOTICE_UI_ID = 'export-view-deprecated-notice';
+  ExportView.SHOW_DEPRECATED_UI_BUTTON_ID = 'export-view-show-deprecated-ui';
+  ExportView.DEPRECATED_EXPORT_UI_ID = 'export-view-ui-deprecated';
+
   ExportView.MAIN_BOX_ID = 'export-view-tab-content';
   ExportView.DOWNLOAD_ANCHOR_ID = 'export-view-download-anchor';
   ExportView.SAVE_FILE_BUTTON_ID = 'export-view-save-log-file';
@@ -62,6 +71,15 @@ var ExportView = (function() {
     __proto__: superClass.prototype,
 
     /**
+     * Hides the export-view deprecation warning message and shows the
+     * deprecated export-view UI.
+     */
+    onShowDeprecatedUI_: function() {
+      setNodeDisplay(this.deprecatedNoticeUI_, false);
+      setNodeDisplay(this.deprecatedExportUI_, true);
+    },
+
+    /**
      * Depending on the value of the checkbox, enables or disables stripping
      * cookies and passwords from log dumps and displayed events.
      */