Perform navigation policy check on UI thread for --site-per-process.

content/browser/frame_host/navigator.h

Index: content/browser/frame_host/navigator.h
diff --git a/content/browser/frame_host/navigator.h b/content/browser/frame_host/navigator.h
index 5d7b904689fdbe204820593a0fc4bb6681b049f5..b229ffb97f2dbaa1901b2cf7e270cd0595d39338 100644
--- a/content/browser/frame_host/navigator.h
+++ b/content/browser/frame_host/navigator.h
@@ -34,6 +34,9 @@ class RenderFrameHostImpl;
 // from WebContentsImpl to this interface.
 class CONTENT_EXPORT Navigator : public base::RefCounted<Navigator> {
  public:
+  // Returns the NavigationController associated with this Navigator.
+  virtual NavigationController* GetController();

[Charlie Reis, 2014/04/24 23:17:50]

We should probably implement this in InterstitialPageNavigatorImpl as well, to
head off bugs for future callers of this.

[nasko, 2014/04/24 23:29:34]

Done.

+
   // The RenderFrameHostImpl started a provisional load.
   virtual void DidStartProvisionalLoad(RenderFrameHostImpl* render_frame_host,
                                        int parent_routing_id,