Convert network hints to Mojo

chrome/renderer/chrome_render_thread_observer.cc

Index: chrome/renderer/chrome_render_thread_observer.cc
diff --git a/chrome/renderer/chrome_render_thread_observer.cc b/chrome/renderer/chrome_render_thread_observer.cc
index a5752171bff3f0ca5965870051992a74d2bb3c27..1a92eddc71ba3de01075f1d214527ebec46aaf15 100644
--- a/chrome/renderer/chrome_render_thread_observer.cc
+++ b/chrome/renderer/chrome_render_thread_observer.cc
@@ -37,6 +37,7 @@
 #include "chrome/common/url_constants.h"
 #include "chrome/renderer/content_settings_observer.h"
 #include "chrome/renderer/security_filter_peer.h"
+#include "components/network_hints/renderer/prescient_networking_dispatcher.h"
 #include "content/public/child/resource_dispatcher_delegate.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
@@ -235,7 +236,10 @@ void CreateResourceUsageReporter(
 bool ChromeRenderThreadObserver::is_incognito_process_ = false;
 
 ChromeRenderThreadObserver::ChromeRenderThreadObserver()
-    : field_trial_syncer_(this), weak_factory_(this) {
+    : field_trial_syncer_(this),
+      prescient_networking_dispatcher_(
+          new network_hints::PrescientNetworkingDispatcher()),
+      weak_factory_(this) {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
@@ -283,6 +287,10 @@ bool ChromeRenderThreadObserver::OnControlMessageReceived(
   return handled;
 }
 
+void ChromeRenderThreadObserver::OnRenderProcessShutdown() {
+  prescient_networking_dispatcher_.reset();
+}
+
 void ChromeRenderThreadObserver::OnFieldTrialGroupFinalized(
     const std::string& trial_name,
     const std::string& group_name) {