Ensure that navigation will proceed when no NavigationHandle is found

content/browser/loader/navigation_resource_throttle.cc

Index: content/browser/loader/navigation_resource_throttle.cc
diff --git a/content/browser/loader/navigation_resource_throttle.cc b/content/browser/loader/navigation_resource_throttle.cc
index 50aa00c427e880dc29d0e4a6a3aaed4e8ed5981d..41ace38b7b1c1f7f18236becf22035955da49486 100644
--- a/content/browser/loader/navigation_resource_throttle.cc
+++ b/content/browser/loader/navigation_resource_throttle.cc
@@ -85,7 +85,7 @@ NavigationHandleImpl* FindNavigationHandle(
           ->navigator()
           ->GetNavigationHandleForFrameHost(render_frame_host);
   if (!navigation_handle) {
-    SendCheckResultToIOThread(callback, NavigationThrottle::CANCEL);
+    SendCheckResultToIOThread(callback, NavigationThrottle::PROCEED);
     return nullptr;
   }
   return navigation_handle;