Prevent state updates for kSwappedOutURL.

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 1358 matching lines @@
 // page ID has been updated so we know what it was.
 void RenderViewImpl::UpdateSessionHistory(WebFrame* frame) {
   // If we have a valid page ID at this point, then it corresponds to the page
   // we are navigating away from.  Otherwise, this is the first navigation, so
   // there is no past session history to record.
   if (page_id_ == -1)
     return;
 
   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)));
 }
 
 void RenderViewImpl::OpenURL(WebFrame* frame,
                              const GURL& url,
                              const Referrer& referrer,
                              WebNavigationPolicy policy) {
   Send(new ViewHostMsg_OpenURL(
       routing_id_,
@@ skipping 2253 matching lines @@
 
 void RenderViewImpl::PlayerGone(webkit_media::WebMediaPlayerImpl* player) {
   DidPause(player);
 }
 
 void RenderViewImpl::SyncNavigationState() {
   if (!webview())
     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() {
   WebFrame* frame = webview()->focusedFrame();
   if (!frame)
     return;
 
   string16 text;
   size_t offset;
   ui::Range range;
@@ skipping 1524 matching lines @@
 bool RenderViewImpl::WebWidgetHandlesCompositorScheduling() const {
   return !!RenderThreadImpl::current()->compositor_thread();
 }
 
 void RenderViewImpl::OnJavaBridgeInit() {
   DCHECK(!java_bridge_dispatcher_.get());
 #if defined(ENABLE_JAVA_BRIDGE)
   java_bridge_dispatcher_.reset(new JavaBridgeDispatcher(this));
 #endif
 }