[tracing] Add support for TracedValue JSON serializer.

test/cctest/BUILD.gn

 # Copyright 2016 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.
 
 import("../../gni/v8.gni")
 
 v8_executable("cctest") {
   testonly = true
 
   sources = [
@@ skipping 149 matching lines @@
     "test-representation.cc",
     "test-sampler-api.cc",
     "test-serialize.cc",
     "test-simd.cc",
     "test-strings.cc",
     "test-strtod.cc",
     "test-symbols.cc",
     "test-thread-termination.cc",
     "test-threads.cc",
     "test-trace-event.cc",
+    "test-traced-value.cc",
     "test-transitions.cc",
     "test-typedarrays.cc",
     "test-types.cc",
     "test-unbound-queue.cc",
     "test-unboxed-doubles.cc",
     "test-unique.cc",
     "test-unscopables-hidden-prototype.cc",
     "test-usecounters.cc",
     "test-utils.cc",
     "test-version.cc",
@@ skipping 251 matching lines @@
   if (is_win) {
     # Suppress warnings about importing locally defined symbols.
     if (is_component_build) {
       ldflags = [
         "/ignore:4049",
         "/ignore:4217",
       ]
     }
   }
 }