add ETW for V8 symbols

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 480cbaa9553f295f6ad844f789e54fa128059402..8d3cfb7c6d4cb605b1e0e196ce1d11f170143477 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2955,6 +2955,27 @@ class V8EXPORT ExternalResourceVisitor {  // NOLINT
 
 
 /**
+ * CodeAddressEvent is used as a callback function for external logging
+ * of symbols to address.
+ */
+enum CodeAddressOperation {
+  Add = 1,
+  Move,
+  Remove,
+  Reset,
+  Source
+};
+
+typedef bool (*CodeAddressEvent)(CodeAddressOperation operation,
+                                 const void* addr1,
+                                 int len,
+                                 const char* symbol,
+                                 int tag,
+                                 const void* addr2,
+                                 int line);
+
+
+/**
  * Container class for static utility functions.
  */
 class V8EXPORT V8 {
@@ -3366,6 +3387,13 @@ class V8EXPORT V8 {
    */
   static int ContextDisposedNotification();
 
+  /**
+   * This function sets or removes callback to get code address locations.
+   * Set enumExisting flag to true to enumerate existing code addresses.
+   */
+  static void SetCodeAddressEventCallback(CodeAddressEvent callback,
+      bool enumExisting);
+
  private:
   V8();