Create NavigationHandles for interstitials if needed

content/browser/loader/navigation_resource_throttle.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_BROWSER_LOADER_NAVIGATION_RESOURCE_THROTTLE_H_
 #define CONTENT_BROWSER_LOADER_NAVIGATION_RESOURCE_THROTTLE_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
 #include "content/public/browser/navigation_throttle.h"
 #include "content/public/browser/resource_throttle.h"
 #include "content/public/common/request_context_type.h"
 
 namespace net {
 class URLRequest;
 }
 
 namespace content {
 class ResourceDispatcherHostDelegate;
 
 // This ResourceThrottle is used to convey throttling information to the UI
 // thread during navigations. The UI thread can then use its NavigationThrottle
 // mechanism to interact with the navigation.
 class NavigationResourceThrottle : public ResourceThrottle {
  public:
   NavigationResourceThrottle(
       net::URLRequest* request,
       ResourceDispatcherHostDelegate* resource_dispatcher_host_delegate,
       RequestContextType request_context_type);
   ~NavigationResourceThrottle() override;
 
   // ResourceThrottle overrides:
   void WillStartRequest(bool* defer) override;
   void WillRedirectRequest(const net::RedirectInfo& redirect_info,
                            bool* defer) override;
   void WillProcessResponse(bool* defer) override;
   const char* GetNameForLogging() const override;
 
+  // Used in unit tests to make UI checks pass when they would fail due to no
+  // NavigationHandle being present in the RenderFrameHost.
+  CONTENT_EXPORT static void set_ui_checks_always_succeed_for_testing(
+      bool ui_checks_always_succeed);
+
  private:
   void OnUIChecksPerformed(NavigationThrottle::ThrottleCheckResult result);
 
   net::URLRequest* request_;
   ResourceDispatcherHostDelegate* resource_dispatcher_host_delegate_;
   RequestContextType request_context_type_;
   base::WeakPtrFactory<NavigationResourceThrottle> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationResourceThrottle);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_RESOURCE_THROTTLE_H_