[subresource_filter] Use the SubresourceFilterObserver for PageLoadMetrics

chrome/browser/subresource_filter/chrome_subresource_filter_client.cc

Index: chrome/browser/subresource_filter/chrome_subresource_filter_client.cc
diff --git a/chrome/browser/subresource_filter/chrome_subresource_filter_client.cc b/chrome/browser/subresource_filter/chrome_subresource_filter_client.cc
index 8a27baba8e9200b7137e5046361410c2c507bd0e..d1cd4aaa0e61809a0875e09207e25f4fc5a0a2a7 100644
--- a/chrome/browser/subresource_filter/chrome_subresource_filter_client.cc
+++ b/chrome/browser/subresource_filter/chrome_subresource_filter_client.cc
@@ -52,12 +52,6 @@ ChromeSubresourceFilterClient::~ChromeSubresourceFilterClient() {}
 void ChromeSubresourceFilterClient::MaybeAppendNavigationThrottles(
     content::NavigationHandle* navigation_handle,
     std::vector<std::unique_ptr<content::NavigationThrottle>>* throttles) {
-  // Don't add any throttles if the feature isn't enabled at all.
-  if (!base::FeatureList::IsEnabled(
-          subresource_filter::kSafeBrowsingSubresourceFilter)) {
-    return;
-  }
-
   if (navigation_handle->IsInMainFrame()) {
     safe_browsing::SafeBrowsingService* safe_browsing_service =
         g_browser_process->safe_browsing_service();