Make browser_handles_top_level_requests synchronous.

content/browser/tab_contents/tab_contents.cc

Index: content/browser/tab_contents/tab_contents.cc
diff --git a/content/browser/tab_contents/tab_contents.cc b/content/browser/tab_contents/tab_contents.cc
index d7b9faee85cc3b6c13e9dfa5f29d155ca32b2426..f986521d2a1aa088e68fddf8b0a68ce7ca37e364 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -2326,6 +2326,23 @@ void WebContentsImpl::RequestTransferURL(
   }
 }
 
+bool WebContentsImpl::ShouldIgnoreNavigation(
+    const GURL& url,
+    const content::Referrer& referrer,
+    WindowOpenDisposition disposition,
+    int64 source_frame_id,
+    bool is_content_initiated) {
+  if (!delegate_)
+    return false;
+  content::PageTransition transition_type = content::PAGE_TRANSITION_LINK;
+  NavigationEntry* active_navigation_entry = controller_.GetActiveEntry();
+  if (active_navigation_entry) {
+    transition_type = active_navigation_entry->GetTransitionType();
+  }
+  return delegate_->ShouldIgnoreNavigation(
+      this, url, referrer, disposition, is_content_initiated, transition_type);
+}
+
 void WebContentsImpl::RunJavaScriptMessage(
     RenderViewHost* rvh,
     const string16& message,