[debugger] basic test infrastructure for new debugger test api.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 2542 matching lines @@
 
   if (is_posix) {
     sources += [ "src/d8-posix.cc" ]
   } else if (is_win) {
     sources += [ "src/d8-windows.cc" ]
   }
 
   if (v8_enable_i18n_support) {
     deps += [ "//third_party/icu" ]
   }
+
+  defines = []
+  if (v8_enable_inspector_override) {
+    defines += [ "V8_INSPECTOR_ENABLED" ]
+  }
 }
 
 v8_isolate_run("d8") {
   deps = [
     ":d8",
   ]
 
   isolate = "//src/d8.isolate"
 }
 
@@ skipping 391 matching lines @@
   ]
 
   configs = [
     ":external_config",
     ":internal_config_base",
   ]
 }
 
 v8_fuzzer("wasm_data_section_fuzzer") {
 }