(Original patch reviewed at http://codereview.chromium.org/2067003 )...

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
===================================================================
--- chrome/browser/tab_contents/tab_contents.h	(revision 47323)
+++ chrome/browser/tab_contents/tab_contents.h	(working copy)
@@ -298,6 +298,10 @@
   // navigation state change to trigger repaint of title.
   void SetAppIcon(const SkBitmap& app_icon);
 
+  bool displayed_insecure_content() const {
+    return displayed_insecure_content_;
+  }
+
   // Internal state ------------------------------------------------------------
 
   // This flag indicates whether the tab contents is currently being
@@ -1135,6 +1139,9 @@
   // Stores which content setting types actually have blocked content.
   bool content_blocked_[CONTENT_SETTINGS_NUM_TYPES];
 
+  // True if this is a secure page which displayed insecure content.
+  bool displayed_insecure_content_;
+
   // Data for shelves and stuff ------------------------------------------------
 
   // Delegates for InfoBars associated with this TabContents.