Implement tracing interface for v8

BUILD.gn

 # Copyright 2014 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/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 if (is_android) {
@@ skipping 577 matching lines @@
       ":features",
       ":toolchain",
     ]
   }
 }
 
 source_set("v8_base") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   sources = [
+    # TODO(fmeawad): This needs to be updated to support standalone V8 builds.
+    "../base/trace_event/common/trace_event_common.h",
     "include/v8-debug.h",
     "include/v8-experimental.h",
     "include/v8-platform.h",
     "include/v8-profiler.h",
     "include/v8-testing.h",
     "include/v8-util.h",
     "include/v8-version.h",
     "include/v8.h",
     "include/v8config.h",
     "src/accessors.cc",
@@ skipping 632 matching lines @@
     "src/snapshot/snapshot.h",
     "src/startup-data-util.h",
     "src/startup-data-util.cc",
     "src/string-builder.cc",
     "src/string-builder.h",
     "src/string-search.h",
     "src/string-stream.cc",
     "src/string-stream.h",
     "src/strtod.cc",
     "src/strtod.h",
+    "src/tracing/trace-event.cc",
+    "src/tracing/trace-event.h",
     "src/transitions-inl.h",
     "src/transitions.cc",
     "src/transitions.h",
     "src/type-cache.cc",
     "src/type-cache.h",
     "src/type-feedback-vector-inl.h",
     "src/type-feedback-vector.cc",
     "src/type-feedback-vector.h",
     "src/type-info.cc",
     "src/type-info.h",
@@ skipping 591 matching lines @@
     if (!is_component_build) {
       sources += [
         "$target_gen_dir/d8-js.cc",
       ]
     }
     if (v8_enable_i18n_support) {
       deps += [ "//third_party/icu" ]
     }
   }
 }