src: fix CreatePlatform header param mismatch

Backport-PR-URL: #23700
PR-URL: #23947
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Matheus Marchini <mat@mmarchini.me>

src/node.h

@@ -100,15 +100,16 @@
 // Forward-declare libuv loop
 struct uv_loop_s;
 
-// Forward-declare TracingController, used by CreatePlatform.
-namespace v8 {
-class TracingController;
-}
-
 // Forward-declare these functions now to stop MSVS from becoming
 // terminally confused when it's done in node_internals.h
 namespace node {
 
+namespace tracing {
+
+class TracingController;
+
+}
+
 NODE_EXTERN v8::Local<v8::Value> ErrnoException(v8::Isolate* isolate,
                                                 int errorno,
                                                 const char* syscall = nullptr,
@@ -298,7 +299,8 @@ NODE_EXTERN MultiIsolatePlatform* GetMainThreadMultiIsolatePlatform();
 
 NODE_EXTERN MultiIsolatePlatform* CreatePlatform(
     int thread_pool_size,
-    v8::TracingController* tracing_controller);
+    node::tracing::TracingController* tracing_controller);
+MultiIsolatePlatform* InitializeV8Platform(int thread_pool_size);
 NODE_EXTERN void FreePlatform(MultiIsolatePlatform* platform);
 
 NODE_EXTERN void EmitBeforeExit(Environment* env);