Reland: Add Scoped Context Info (Isolate) to V8 Traces

src/libplatform/default-platform.cc

Index: src/libplatform/default-platform.cc
diff --git a/src/libplatform/default-platform.cc b/src/libplatform/default-platform.cc
index 6902504d107a71eedd5a80c6292eaea5c1cfe2bd..50d8aa766a10d9b36513582ddb614783eab7a1f4 100644
--- a/src/libplatform/default-platform.cc
+++ b/src/libplatform/default-platform.cc
@@ -172,6 +172,16 @@ double DefaultPlatform::MonotonicallyIncreasingTime() {
 
 uint64_t DefaultPlatform::AddTraceEvent(
     char phase, const uint8_t* category_enabled_flag, const char* name,
+    const char* scope, uint64_t id, uint64_t bind_id, int num_args,
+    const char** arg_names, const uint8_t* arg_types,
+    const uint64_t* arg_values, unsigned int flags) {
+  return 0;
+}
+
+
+// TODO(fmeawad): Remove once all embedders implement the scope version.
+uint64_t DefaultPlatform::AddTraceEvent(
+    char phase, const uint8_t* category_enabled_flag, const char* name,
     uint64_t id, uint64_t bind_id, int num_args, const char** arg_names,
     const uint8_t* arg_types, const uint64_t* arg_values, unsigned int flags) {
   return 0;
@@ -194,6 +204,7 @@ const char* DefaultPlatform::GetCategoryGroupName(
   return dummy;
 }
 
+
 size_t DefaultPlatform::NumberOfAvailableBackgroundThreads() {
   return static_cast<size_t>(thread_pool_size_);
 }