Declarative resource hints go through mojo IPC to //content

chrome/browser/renderer_host/chrome_render_message_filter.cc

Index: chrome/browser/renderer_host/chrome_render_message_filter.cc
diff --git a/chrome/browser/renderer_host/chrome_render_message_filter.cc b/chrome/browser/renderer_host/chrome_render_message_filter.cc
index 1a48364b54c7839d39063d124d3d35240d9f2a58..7e967fba9907ccb8a18c522b2e58e5474c3d4f5d 100644
--- a/chrome/browser/renderer_host/chrome_render_message_filter.cc
+++ b/chrome/browser/renderer_host/chrome_render_message_filter.cc
@@ -65,7 +65,6 @@ bool ChromeRenderMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ChromeRenderMessageFilter, message)
     IPC_MESSAGE_HANDLER(NetworkHintsMsg_DNSPrefetch, OnDnsPrefetch)
-    IPC_MESSAGE_HANDLER(NetworkHintsMsg_Preconnect, OnPreconnect)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_UpdatedCacheStats,
                         OnUpdatedCacheStats)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_AllowDatabase, OnAllowDatabase)
@@ -112,22 +111,6 @@ void ChromeRenderMessageFilter::OnDnsPrefetch(
     predictor_->DnsPrefetchList(request.hostname_list);
 }
 
-void ChromeRenderMessageFilter::OnPreconnect(const GURL& url,
-                                             bool allow_credentials,
-                                             int count) {
-  if (count < 1) {
-    LOG(WARNING) << "NetworkHintsMsg_Preconnect IPC with invalid count: "
-                 << count;
-    return;
-  }
-  if (predictor_ && url.is_valid() && url.has_host() && url.has_scheme() &&
-      url.SchemeIsHTTPOrHTTPS()) {
-    predictor_->PreconnectUrl(url, GURL(),
-                              chrome_browser_net::UrlInfo::EARLY_LOAD_MOTIVATED,
-                              allow_credentials, count);
-  }
-}
-
 void ChromeRenderMessageFilter::OnUpdatedCacheStats(
     uint64_t min_dead_capacity,
     uint64_t max_dead_capacity,