Revert "Add a new API V8::SetJitCodeEventHandler to push code name and location to users such as pr…

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 111f9cffd3655992b161fba4860e190d205c062d..a7b5254b4c0994dac6eb3d1b42d84caecbaa4cb0 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2945,57 +2945,6 @@ typedef void (*FunctionEntryHook)(uintptr_t function,
 
 
 /**
- * A JIT code event is issued each time code is added, moved or removed.
- *
- * \note removal events are not currently issued.
- */
-struct JitCodeEvent {
-  enum EventType {
-    CODE_ADDED,
-    CODE_MOVED,
-    CODE_REMOVED
-  };
-
-  // Type of event.
-  EventType type;
-  // Start of the instructions.
-  void* code_start;
-  // Size of the instructions.
-  size_t code_len;
-
-  union {
-    // Only valid for CODE_ADDED.
-    struct {
-      // Name of the object associated with the code, note that the string is
-      // not zero-terminated.
-      const char* str;
-      // Number of chars in str.
-      size_t len;
-    } name;
-    // New location of instructions. Only valid for CODE_MOVED.
-    void* new_code_start;
-  };
-};
-
-/**
- * Option flags passed to the SetJitCodeEventHandler function.
- */
-enum JitCodeEventOptions {
-  kJitCodeEventDefault = 0,
-  // Generate callbacks for already existent code.
-  kJitCodeEventEnumExisting = 1
-};
-
-
-/**
- * Callback function passed to SetJitCodeEventHandler.
- *
- * \param event code add, move or removal event.
- */
-typedef void (*JitCodeEventHandler)(const JitCodeEvent* event);
-
-
-/**
  * Interface for iterating though all external resources in the heap.
  */
 class V8EXPORT ExternalResourceVisitor {  // NOLINT
@@ -3270,29 +3219,6 @@ class V8EXPORT V8 {
   static bool SetFunctionEntryHook(FunctionEntryHook entry_hook);
 
   /**
-   * Allows the host application to provide the address of a function that is
-   * notified each time code is added, moved or removed.
-   *
-   * \param options options for the JIT code event handler.
-   * \param event_handler the JIT code event handler, which will be invoked
-   *     each time code is added, moved or removed.
-   * \note \p event_handler won't get notified of existent code.
-   * \note since code removal notifications are not currently issued, the
-   *     \p event_handler may get notifications of code that overlaps earlier
-   *     code notifications. This happens when code areas are reused, and the
-   *     earlier overlapping code areas should therefore be discarded.
-   * \note the events passed to \p event_handler and the strings they point to
-   *     are not guaranteed to live past each call. The \p event_handler must
-   *     copy strings and other parameters it needs to keep around.
-   * \note the set of events declared in JitCodeEvent::EventType is expected to
-   *     grow over time, and the JitCodeEvent structure is expected to accrue
-   *     new members. The \p event_handler function must ignore event codes
-   *     it does not recognize to maintain future compatibility.
-   */
-  static void SetJitCodeEventHandler(JitCodeEventOptions options,
-                                     JitCodeEventHandler event_handler);
-
-  /**
    * Adjusts the amount of registered external memory.  Used to give
    * V8 an indication of the amount of externally allocated memory
    * that is kept alive by JavaScript objects.  V8 uses this to decide