Capture a report on failed browser rendez-vous.

third_party/kasko/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 declare_args() {
   # Enable the Kasko crash reporter. Enabled by default on syzyasan build.
   enable_kasko = is_syzyasan
 
   # Enable the reporting of browser hangs with Kasko.
   enable_kasko_hang_reports = false
+
+  # Enable the reporting of failed browser rendez-vous with Kasko.
+  enable_kasko_failed_rdv_reports = false
 }
 
 # GYP version: target 'kasko_features' in third_party/kasko/kasko.gyp
 buildflag_header("kasko_features") {
   header = "kasko_features.h"
   flags = [
     "ENABLE_KASKO=$enable_kasko",
     "ENABLE_KASKO_HANG_REPORTS=$enable_kasko_hang_reports",
+    "ENABLE_KASKO_FAILED_RDV_REPORTS=$enable_kasko_failed_rdv_reports",
   ]
 }
 
 if (enable_kasko) {
   assert(is_win, "Kasko only support Windows.")
   assert(target_cpu == "x86", "Kasko only support 32 bits.")
   assert(is_chrome_branded,
          "The Kasko client is only initialized in Chrome-branded builds.")
 
   config("kasko_config") {
@@ skipping 23 matching lines @@
     ]
     public_configs = [ ":kasko_config" ]
   }
 } else {
   group("kasko") {
     public_deps = [
       ":kasko_features",
     ]
   }
 }