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 2d025de2698b28aec0bf3428fea3ff5db1c8b0b5..78783aa8968233e08c2c2aafbc3532bb019b865b 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"
@@ -29,6 +30,10 @@ class MdHistoryUI : public content::WebUIController {
       ui::ScaleFactor scale_factor);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(ContinueWhereILeftOffTest, HistoryBrowserClose);
+
+  static bool use_test_title;
+
   DISALLOW_COPY_AND_ASSIGN(MdHistoryUI);
 };