Include status and exit_code in the log.

Bug: 1045980
Change-Id: I3eed762b79c3bdda55271a1b5716277a3ba32336
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2023675Reviewed-by: Peter Kvitek <kvitekp@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735627}

headless/test/headless_browser_test.cc

@@ -264,7 +264,8 @@ void HeadlessAsyncDevTooledBrowserTest::RenderProcessExited(
 
   FinishAsynchronousTest();
   render_process_exited_ = true;
-  FAIL() << "Abnormal renderer termination";
+  FAIL() << "Abnormal renderer termination "
+         << "(status=" << status << ", exit_code=" << exit_code << ")";
 }
 
 void HeadlessAsyncDevTooledBrowserTest::RunTest() {