[Tracing] V8 Tracing Controller

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index a11b1467e286fdc799183bca0d3c358bc29fcb31..016172171036605485db82466b118d630968bac4 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -2013,10 +2013,18 @@ v8_source_set("v8_libbase") {
 v8_source_set("v8_libplatform") {
   sources = [
     "include/libplatform/libplatform.h",
+    "include/libplatform/v8-tracing.h",
     "src/libplatform/default-platform.cc",
     "src/libplatform/default-platform.h",
+    "src/libplatform/default-tracing-controller.cc",
     "src/libplatform/task-queue.cc",
     "src/libplatform/task-queue.h",
+    "src/libplatform/tracing/trace-buffer.cc",
+    "src/libplatform/tracing/trace-buffer.h",
+    "src/libplatform/tracing/trace-config.cc",
+    "src/libplatform/tracing/trace-object.cc",
+    "src/libplatform/tracing/trace-writer.cc",
+    "src/libplatform/tracing/trace-writer.h",
     "src/libplatform/worker-thread.cc",
     "src/libplatform/worker-thread.h",
   ]