Avoid using stale InspectedContext pointers

src/inspector/injected-script.cc

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 81 matching lines @@
            .ToLocal(&value))
     return nullptr;
   DCHECK(value->IsFunction());
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(value);
   v8::Local<v8::Object> windowGlobal = context->Global();
   v8::Local<v8::Value> info[] = {
       scriptHostWrapper, windowGlobal,
       v8::Number::New(isolate, inspectedContext->contextId())};
   v8::MicrotasksScope microtasksScope(isolate,
                                       v8::MicrotasksScope::kDoNotRunMicrotasks);
+
+  int contextGroupId = inspectedContext->contextGroupId();
+  int contextId = inspectedContext->contextId();
+  V8InspectorImpl* inspector = inspectedContext->inspector();
   v8::Local<v8::Value> injectedScriptValue;
   if (!function->Call(context, windowGlobal, arraysize(info), info)
            .ToLocal(&injectedScriptValue))
     return nullptr;
+  if (inspector->getContext(contextGroupId, contextId) != inspectedContext)
+    return nullptr;
   if (!injectedScriptValue->IsObject()) return nullptr;
   return wrapUnique(new InjectedScript(inspectedContext,
                                        injectedScriptValue.As<v8::Object>(),
                                        std::move(injectedScriptNative)));
 }
 
 InjectedScript::InjectedScript(
     InspectedContext* context, v8::Local<v8::Object> object,
     std::unique_ptr<InjectedScriptNative> injectedScriptNative)
     : m_context(context),
@@ skipping 450 matching lines @@
 void InjectedScript::CallFrameScope::findInjectedScript(
     V8InspectorSessionImpl* session) {
   std::unique_ptr<RemoteCallFrameId> remoteId =
       RemoteCallFrameId::parse(m_errorString, m_remoteCallFrameId);
   if (!remoteId) return;
   m_frameOrdinal = static_cast<size_t>(remoteId->frameOrdinal());
   m_injectedScript = session->findInjectedScript(m_errorString, remoteId.get());
 }
 
 }  // namespace v8_inspector