From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Mon, 20 Jul 2020 14:02:56 -0700
Subject: fix: missing WeakPtr check in PreconnectManager

https://chromium-review.googlesource.com/c/chromium/src/+/2295780
added UKM around prefetch accuracy stats, which involved an added line
in PreconnectManager::TryToLaunchPreresolveJobs() that did not check
the WeakPtr before using it. This fixes that.

Upstreamed at: https://chromium-review.googlesource.com/c/chromium/src/+/2309029

diff --git a/chrome/browser/predictors/preconnect_manager.cc b/chrome/browser/predictors/preconnect_manager.cc
index 78216f0083281b4f1e0209f766753d0dc9c796c4..bd81f631b15cc4cb8c54afd51bd8739f4256ae33 100644
--- a/chrome/browser/predictors/preconnect_manager.cc
+++ b/chrome/browser/predictors/preconnect_manager.cc
@@ -231,7 +231,8 @@ void PreconnectManager::TryToLaunchPreresolveJobs() {
                          weak_factory_.GetWeakPtr(), job_id));
       if (info) {
         ++info->inflight_count;
-        delegate_->PreconnectInitiated(info->url, job->url);
+        if (delegate_)
+          delegate_->PreconnectInitiated(info->url, job->url);
       }
       ++inflight_preresolves_count_;
     } else {