Prevent state updates for kSwappedOutURL.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 7cc0a21e7f5bb33127a0c42565d3e81f4a2b1e63..bf0380f89c969180a4affba552dcf704f7a68e31 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1376,9 +1376,17 @@ void RenderViewImpl::UpdateSessionHistory(WebFrame* frame) {
 
   const WebHistoryItem& item =
       webview()->mainFrame()->previousHistoryItem();
+  SendUpdateState(item);
+}
+
+void RenderViewImpl::SendUpdateState(const WebHistoryItem& item) {
   if (item.isNull())
     return;
 
+  // Don't send state updates for chrome::kSwappedOutURL.
+  if (item.urlString() == WebString::fromUTF8(chrome::kSwappedOutURL))
+    return;
+
   Send(new ViewHostMsg_UpdateState(
       routing_id_, page_id_, webkit_glue::HistoryItemToString(item)));
 }
@@ -3652,11 +3660,7 @@ void RenderViewImpl::SyncNavigationState() {
     return;
 
   const WebHistoryItem& item = webview()->mainFrame()->currentHistoryItem();
-  if (item.isNull())
-    return;
-
-  Send(new ViewHostMsg_UpdateState(
-      routing_id_, page_id_, webkit_glue::HistoryItemToString(item)));
+  SendUpdateState(item);
 }
 
 void RenderViewImpl::SyncSelectionIfRequired() {