Refactor NavigationHandleImpl::RegisterNavigationThrottles.

content/browser/frame_host/navigation_handle_impl.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_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 
 #include "content/public/browser/navigation_handle.h"
 
 #include <stddef.h>
@@ skipping 411 matching lines @@
   // Helper function to run and reset the |complete_callback_|. This marks the
   // end of a round of NavigationThrottleChecks.
   void RunCompleteCallback(NavigationThrottle::ThrottleCheckResult result);
 
   // Used in tests.
   State state() const { return state_; }
 
   // Populates |throttles_| with the throttles for this navigation.
   void RegisterNavigationThrottles();
 
+  // Takes ownership of |throttle| (if any) and appends it to |throttles_|.
+  void AddThrottle(std::unique_ptr<NavigationThrottle> throttle);
+
   // Checks for attempts to navigate to a page that is already referenced more
   // than once in the frame's ancestors.  This is a helper function used by
   // WillStartRequest and WillRedirectRequest to prevent the navigation.
   bool IsSelfReferentialURL();
 
   // Updates the destination site URL for this navigation. This is called on
   // redirects.
   // PlzNavigate: |post_redirect_process| is the renderer process that should
   // handle the navigation following the redirect if it can be handled by an
   // existing RenderProcessHost. Otherwise, it should be null.
@@ skipping 150 matching lines @@
   bool is_in_constructor;
 
   base::WeakPtrFactory<NavigationHandleImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_