RSS feed support (part 1), 2nd attempt

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
===================================================================
--- chrome/browser/tab_contents/tab_contents.h	(revision 11648)
+++ chrome/browser/tab_contents/tab_contents.h	(working copy)
@@ -73,10 +73,11 @@
   // Flags passed to the TabContentsDelegate.NavigationStateChanged to tell it
   // what has changed. Combine them to update more than one thing.
   enum InvalidateTypes {
-    INVALIDATE_URL = 1,      // The URL has changed.
-    INVALIDATE_TITLE = 2,    // The title has changed.
-    INVALIDATE_FAVICON = 4,  // The favicon has changed.
-    INVALIDATE_LOAD = 8,     // The loading state has changed
+    INVALIDATE_URL = 1,        // The URL has changed.
+    INVALIDATE_TITLE = 2,      // The title has changed.
+    INVALIDATE_FAVICON = 4,    // The favicon has changed.
+    INVALIDATE_LOAD = 8,       // The loading state has changed.
+    INVALIDATE_FEEDLIST = 16,  // The Atom/RSS feed has changed.
 
     // Helper for forcing a refresh.
     INVALIDATE_EVERYTHING = 0xFFFFFFFF