Introduce SubframeNavigationFilteringThrottle

content/public/browser/navigation_handle.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_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 260 matching lines @@
       RenderFrameHost* render_frame_host,
       const std::string& raw_response_headers) = 0;
 
   // Simulates the navigation being committed.
   virtual void CallDidCommitNavigationForTesting(const GURL& url) = 0;
 
   // The NavigationData that the embedder returned from
   // ResourceDispatcherHostDelegate::GetNavigationData during commit. This will
   // be a clone of the NavigationData.
   virtual NavigationData* GetNavigationData() = 0;
+
+  // This method is designed to be used for the Call*ForTesting methods, where
+  // the decision to cancel is deferred and calculated asynchronously. In those
+  // cases, this method will return true once CancelDeferredNavigation is
+  // called.
+  virtual bool IsCancellingForTesting() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_