electron/patches/chromium/disable_unload_metrics.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cheng Zhao <zcbenz@gmail.com>
Date: Thu, 20 Sep 2018 17:45:47 -0700
Subject: fix: disable unload metrics

Chromium introduced unload metrics in:
https://chromium-review.googlesource.com/c/chromium/src/+/2314877

Which would cause some DCHECKs to assert in Electron:
https://github.com/electron/electron/issues/27717

And it would then crash and make some tests fail:
crashReporter module should send minidump when sandboxed renderer crashes api-crash-reporter-spec.ts 643 ms
Error message:
ptype: expected 'browser' to equal 'renderer'
Error stack trace:
AssertionError: ptype: expected 'browser' to equal 'renderer'
    at checkCrash (electron\spec\api-crash-reporter-spec.ts:39:35)
    at Context.<anonymous> (electron\spec\api-crash-reporter-spec.ts:154:7)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)

This patch temporarily disables the metrics so we can have green CI, and we
should continue seeking for a real fix.

diff --git a/content/browser/renderer_host/navigator.cc b/content/browser/renderer_host/navigator.cc
index 91a343f61358f6328098d4d9f66aa6ccca3a0186..2824634af8d01fac7e658fa7435bb2f64c7b1f6b 100644
--- a/content/browser/renderer_host/navigator.cc
+++ b/content/browser/renderer_host/navigator.cc
@@ -1297,6 +1297,7 @@ void Navigator::RecordNavigationMetrics(
             .InMilliseconds());
   }
 
+#if 0
   // If this is a same-process navigation and we have timestamps for unload
   // durations, fill those metrics out as well.
   if (params.unload_start && params.unload_end &&
@@ -1346,6 +1347,7 @@ void Navigator::RecordNavigationMetrics(
          first_before_unload_start_time)
             .InMilliseconds());
   }
+#endif
 
   builder.Record(ukm::UkmRecorder::Get());
   metrics_data_.reset();