Refactor NavigationHandleImpl::RegisterNavigationThrottles.

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 05fd51b502b0175f2e538a56558368fb5268b4e6..13a20e53274caec71bb629cf0169b528e730a401 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -429,6 +429,9 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   // Populates |throttles_| with the throttles for this navigation.
   void RegisterNavigationThrottles();
 
+  // Append a new NavigationThrottle (if any) to |throttle_|.

[clamy, 2017/07/11 12:32:37]

I would rephrase this as
// Takes ownership of |throttle| and appends it to |throttle_|.

[arthursonzogni, 2017/07/11 14:36:35]

Done.

+  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.