Invalidate the page state when restoring WebUIs

chrome/browser/ui/webui/md_history_ui.h

Index: chrome/browser/ui/webui/md_history_ui.h
diff --git a/chrome/browser/ui/webui/md_history_ui.h b/chrome/browser/ui/webui/md_history_ui.h
index 2b99bac9ee3c743d1b8d020dd1019f90c48eae17..024a91d0379b93683d0a88f10811220b2d1a6145 100644
--- a/chrome/browser/ui/webui/md_history_ui.h
+++ b/chrome/browser/ui/webui/md_history_ui.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_UI_WEBUI_MD_HISTORY_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_MD_HISTORY_UI_H_
 
+#include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/base/layout.h"
@@ -40,6 +41,10 @@ class MdHistoryUI : public content::WebUIController {
       ui::ScaleFactor scale_factor);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(ContinueWhereILeftOffTest, MDHistoryUpgrade);
+
+  static bool use_test_title_;
+
   // Handler for the "menuPromoShown" message from the page. No arguments.
   void HandleMenuPromoShown(const base::ListValue* args);