Do not commit InstantLoader server redirects till the page supports instant.

chrome/browser/instant/instant_loader.h

Index: chrome/browser/instant/instant_loader.h
diff --git a/chrome/browser/instant/instant_loader.h b/chrome/browser/instant/instant_loader.h
index 185d2ff53e9317c3b7838c66ac3adf826f2e5c61..9e1f2c76ab89d529c565f66fa3cd80015edcf3cf 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -151,6 +151,11 @@ class InstantLoader : public InstantClient::Delegate,
   // Used to get notifications about renderers coming and going.
   content::NotificationRegistrar registrar_;
 
+  // An expected redirect, needs to be stored since
+  // DidCommitProvisionalLoadForFrame does not contain information if the load
+  // is the result of a redirect.
+  GURL expected_redirect_;
+
   DISALLOW_COPY_AND_ASSIGN(InstantLoader);
 };