Capture a report on failed browser rendez-vous.

third_party/kasko/kasko.gyp

 {
   'targets': [
     {
       # GN: //third_party/kasko:kasko_features
       'target_name': 'kasko_features',
       'type': 'none',
       'includes': [ '../../build/buildflag_header.gypi' ],
       'variables': {
         'buildflag_header_path': 'third_party/kasko/kasko_features.h',
         'buildflag_flags': [
           'ENABLE_KASKO=<(kasko)',
           'ENABLE_KASKO_HANG_REPORTS=<(kasko_hang_reports)',
+          'ENABLE_KASKO_FAILED_RDV_REPORTS=<(kasko_failed_rdv_reports)',
         ],
       },
     },
   ],
   'conditions': [
     ['kasko==1', {
       'targets': [
         {
           # GN: //third_party/kasko:copy_kasko_dll
           'target_name': 'copy_kasko_dll',
@@ skipping 50 matching lines @@
           'target_name': 'kasko',
           'type': 'none',
           'dependencies': [
             'kasko_features',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }