Discard SSL certificates for non-committed entries to save memory.

content/browser/frame_host/navigation_controller_impl.h

Index: content/browser/frame_host/navigation_controller_impl.h
diff --git a/content/browser/frame_host/navigation_controller_impl.h b/content/browser/frame_host/navigation_controller_impl.h
index 84125392219b77f8b75055db7877dbe5ffc6f3d4..c96f4ef9cb7486d7551f19ade2fbea17a3f85b91 100644
--- a/content/browser/frame_host/navigation_controller_impl.h
+++ b/content/browser/frame_host/navigation_controller_impl.h
@@ -349,6 +349,9 @@ class CONTENT_EXPORT NavigationControllerImpl
   // specified |offset|.  The index returned is not guaranteed to be valid.
   int GetIndexForOffset(int offset) const;
 
+  // Removes SSL certificate for all entries other than the last committed one.
+  void DiscardUnusedSSLCerts();
+
   // ---------------------------------------------------------------------------
 
   // The user browser context associated with this controller.