NavigationThrottle: allow customization of net::Error when blocking

components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc

Index: components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc
diff --git a/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc b/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc
index a3c3e40bdbbf937074216cb8e089e216f9c52fc3..e7153ab566846a49608e3e78c74991e23c2c8c28 100644
--- a/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc
+++ b/components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.cc
@@ -44,13 +44,13 @@ SubresourceFilterSafeBrowsingActivationThrottle::
 content::NavigationThrottle::ThrottleCheckResult
 SubresourceFilterSafeBrowsingActivationThrottle::WillStartRequest() {
   CheckCurrentUrl();
-  return content::NavigationThrottle::ThrottleCheckResult::PROCEED;
+  return content::NavigationThrottle::PROCEED;
 }
 
 content::NavigationThrottle::ThrottleCheckResult
 SubresourceFilterSafeBrowsingActivationThrottle::WillRedirectRequest() {
   CheckCurrentUrl();
-  return content::NavigationThrottle::ThrottleCheckResult::PROCEED;
+  return content::NavigationThrottle::PROCEED;
 }
 
 content::NavigationThrottle::ThrottleCheckResult
@@ -61,10 +61,10 @@ SubresourceFilterSafeBrowsingActivationThrottle::WillProcessResponse() {
   // No need to defer the navigation if the check already happened.
   if (check_results_.back().finished) {
     NotifyResult();
-    return content::NavigationThrottle::ThrottleCheckResult::PROCEED;
+    return content::NavigationThrottle::PROCEED;
   }
   defer_time_ = base::TimeTicks::Now();
-  return content::NavigationThrottle::ThrottleCheckResult::DEFER;
+  return content::NavigationThrottle::DEFER;
 }
 
 const char*