[debugger] sunset --expose-debug-as flag.

src/bootstrapper.cc

 // Copyright 2014 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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 4058 matching lines @@
   HandleScope scope(isolate);
   Handle<JSGlobalObject> global(JSGlobalObject::cast(
       native_context->global_object()));
 
   Handle<JSObject> Error = isolate->error_function();
   Handle<String> name =
       factory->InternalizeOneByteString(STATIC_CHAR_VECTOR("stackTraceLimit"));
   Handle<Smi> stack_trace_limit(Smi::FromInt(FLAG_stack_trace_limit), isolate);
   JSObject::AddProperty(Error, name, stack_trace_limit, NONE);
 
-  // Expose the debug global object in global if a name for it is specified.
-  if (FLAG_expose_debug_as != NULL && strlen(FLAG_expose_debug_as) != 0) {
-    // If loading fails we just bail out without installing the
-    // debugger but without tanking the whole context.
-    Debug* debug = isolate->debug();
-    if (!debug->Load()) return true;
-    Handle<Context> debug_context = debug->debug_context();
-    // Set the security token for the debugger context to the same as
-    // the shell native context to allow calling between these (otherwise
-    // exposing debug global object doesn't make much sense).
-    debug_context->set_security_token(native_context->security_token());
-    Handle<String> debug_string =
-        factory->InternalizeUtf8String(FLAG_expose_debug_as);
-    uint32_t index;
-    if (debug_string->AsArrayIndex(&index)) return true;
-    Handle<Object> global_proxy(debug_context->global_proxy(), isolate);
-    JSObject::AddProperty(global, debug_string, global_proxy, DONT_ENUM);
-  }
-
   WasmJs::Install(isolate, global);
 
   return true;
 }
 
 
 static uint32_t Hash(RegisteredExtension* extension) {
   return v8::internal::ComputePointerHash(extension);
 }
 
@@ skipping 567 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8