Create NavigationHandles for interstitials if needed

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 38e19b1e4d82f0247f8d0375079a51d9ee9aa903..71019d1045d8125bc35ecbb8d3d1630523c556c0 100644
--- a/content/browser/frame_host/navigator_delegate.h
+++ b/content/browser/frame_host/navigator_delegate.h
@@ -5,9 +5,11 @@
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_
 
+#include "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/navigation_throttle.h"
 #include "content/public/browser/reload_type.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/window_open_disposition.h"
@@ -132,6 +134,12 @@ class CONTENT_EXPORT NavigatorDelegate {
 
   // The load progress was changed.
   virtual void DidChangeLoadProgress() {}
+
+  // Returns the NavigationThrottles to add to this navigation. Normally these
+  // are defined by the content/ embedder, except in the case of interstitials
+  // where no NavigationThrottles are added to the navigation.
+  virtual ScopedVector<NavigationThrottle> CreateThrottlesForNavigation(
+      NavigationHandle* navigation_handle);
 };
 
 }  // namspace content