[inspector] fixed injected-script-host crash

src/inspector/v8-injected-script-host.cc

 // Copyright 2015 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/inspector/v8-injected-script-host.h"
 
 #include "src/base/macros.h"
 #include "src/inspector/injected-script-native.h"
 #include "src/inspector/string-util.h"
 #include "src/inspector/v8-debugger.h"
@@ skipping 87 matching lines @@
       v8::debug::GetBuiltin(isolate, v8::debug::kObjectGetOwnPropertyNames));
   createDataProperty(
       context, injectedScriptHost,
       toV8StringInternalized(isolate, "getOwnPropertySymbols"),
       v8::debug::GetBuiltin(isolate, v8::debug::kObjectGetOwnPropertySymbols));
   return injectedScriptHost;
 }
 
 void V8InjectedScriptHost::nullifyPrototypeCallback(
     const v8::FunctionCallbackInfo<v8::Value>& info) {
-  CHECK(info.Length() == 1 && info[0]->IsObject());
+  CHECK(info.Length() == 1);
+  DCHECK(info[0]->IsObject());
+  if (!info[0]->IsObject()) return;
   v8::Isolate* isolate = info.GetIsolate();
   info[0]
       .As<v8::Object>()
       ->SetPrototype(isolate->GetCurrentContext(), v8::Null(isolate))
       .ToChecked();
 }
 
 void V8InjectedScriptHost::getPropertyCallback(
     const v8::FunctionCallbackInfo<v8::Value>& info) {
   CHECK(info.Length() == 2 && info[1]->IsString());
@@ skipping 207 matching lines @@
     UNREACHABLE();
     return;
   }
   v8::Local<v8::Object> target = info[0].As<v8::Proxy>();
   while (target->IsProxy())
     target = v8::Local<v8::Proxy>::Cast(target)->GetTarget();
   info.GetReturnValue().Set(target);
 }
 
 }  // namespace v8_inspector