Implement tracing interface for v8

test/unittests/unittests.gyp

 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'v8_code': 1,
   },
   'includes': ['../../build/toolchain.gypi', '../../build/features.gypi'],
   'targets': [
@@ skipping 77 matching lines @@
         'compiler/scheduler-unittest.cc',
         'compiler/simplified-operator-reducer-unittest.cc',
         'compiler/simplified-operator-unittest.cc',
         'compiler/state-values-utils-unittest.cc',
         'compiler/tail-call-optimization-unittest.cc',
         'compiler/typer-unittest.cc',
         'compiler/value-numbering-reducer-unittest.cc',
         'compiler/zone-pool-unittest.cc',
         'counters-unittest.cc',
         'interpreter/bytecode-array-builder-unittest.cc',
+        'tracing/trace-event-unittest.cc',
         'libplatform/default-platform-unittest.cc',
         'libplatform/task-queue-unittest.cc',
         'libplatform/worker-thread-unittest.cc',
         'heap/gc-idle-time-handler-unittest.cc',
         'heap/memory-reducer-unittest.cc',
         'heap/heap-unittest.cc',
         'run-all-unittests.cc',
         'test-utils.h',
         'test-utils.cc',
       ],
@@ skipping 57 matching lines @@
         }],
         ['v8_wasm!=0', {
           'dependencies': [
             '../../third_party/wasm/test/unittests/wasm/wasm.gyp:wasm_unittests',
           ],
         }],
       ],
     },
   ],
 }