Take out the is_content_filtered bool that gets passed around betwen renderer...

content/browser/tab_contents/navigation_controller.h

Index: content/browser/tab_contents/navigation_controller.h
===================================================================
--- content/browser/tab_contents/navigation_controller.h	(revision 76828)
+++ content/browser/tab_contents/navigation_controller.h	(working copy)
@@ -59,7 +59,6 @@
           did_replace_entry(false),
           is_in_page(false),
           is_main_frame(true),
-          is_content_filtered(false),
           http_status_code(0) {
     }
 
@@ -98,10 +97,6 @@
     // sub-frame.
     bool is_main_frame;
 
-    // Whether the content of this frame has been altered/blocked because it was
-    // unsafe.
-    bool is_content_filtered;
-
     // When the committed load is a web page from the renderer, this string
     // specifies the security state if the page is secure.
     // See ViewHostMsg_FrameNavigate_Params.security_info, where it comes from.