[debug] do not retroactively apply script break points.

src/debug/debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/debug/debug.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 1857 matching lines @@
       script->type() != i::Script::TYPE_WASM) {
     return;
   }
   SuppressDebug while_processing(this);
 
   bool in_nested_debug_scope = in_debug_scope();
   HandleScope scope(isolate_);
   DebugScope debug_scope(this);
   if (debug_scope.failed()) return;
 
-  if (event == v8::AfterCompile) {
-    // If debugging there might be script break points registered for this
-    // script. Make sure that these break points are set.
-    Handle<Object> argv[] = {Script::GetWrapper(script)};
-    if (CallFunction("UpdateScriptBreakPoints", arraysize(argv), argv)
-            .is_null()) {
-      return;
-    }
-  }
-
   // Create the compile state object.
   Handle<Object> event_data;
   // Bail out and don't call debugger if exception.
   if (!MakeCompileEvent(script, event).ToHandle(&event_data)) return;
 
   // Don't call NotifyMessageHandler if already in debug scope to avoid running
   // nested command loop.
   if (in_nested_debug_scope) {
     if (event_listener_.is_null()) return;
     // Create the execution state.
@@ skipping 610 matching lines @@
   logger_->DebugEvent("Put", message.text());
 }
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 }  // namespace internal
 }  // namespace v8