Shortcut cross-process frame transfers to avoid pending NavigationEntries.

content/browser/frame_host/navigator_delegate.h

Index: content/browser/frame_host/navigator_delegate.h
diff --git a/content/browser/frame_host/navigator_delegate.h b/content/browser/frame_host/navigator_delegate.h
index 79fb7966936040bd680bc2d6d4a3789f0fa135e5..3263ffd174067719b92eca4aa36caaa8dccb6a6d 100644
--- a/content/browser/frame_host/navigator_delegate.h
+++ b/content/browser/frame_host/navigator_delegate.h
@@ -108,6 +108,10 @@ class CONTENT_EXPORT NavigatorDelegate {
   virtual void RequestOpenURL(RenderFrameHostImpl* render_frame_host,
                               const OpenURLParams& params) {}
 
+  // Returns whether to continue a navigation that needs to transfer to a
+  // different process between the load start and commit.
+  virtual bool ShouldTransferNavigation();
+
   // Returns whether URLs for aborted browser-initiated navigations should be
   // preserved in the omnibox.  Defaults to false.
   virtual bool ShouldPreserveAbortedURLs();