[DevTools] Force context creation when runtime is enabled.

third_party/WebKit/Source/platform/v8_inspector/V8RuntimeAgentImpl.cpp

 /*
  * Copyright (C) 2011 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 70 matching lines @@
     const Maybe<bool>& generatePreview,
     const Maybe<bool>& userGesture,
     OwnPtr<RemoteObject>* result,
     Maybe<bool>* wasThrown,
     Maybe<ExceptionDetails>* exceptionDetails)
 {
     int contextId;
     if (executionContextId.isJust()) {
         contextId = executionContextId.fromJust();
     } else {
-        InspectedContext* mainInGroup = nullptr;
-        if (const V8DebuggerImpl::ContextByIdMap* contexts = m_debugger->contextGroup(m_session->contextGroupId())) {
-            for (auto& idContext : *contexts) {
-                if (idContext.second->isMainInGroup()) {
-                    mainInGroup = idContext.second;
-                    break;
-                }
-            }
-        }
-        if (!mainInGroup) {
+        contextId = m_debugger->client()->ensureDefaultContextInGroup(m_session->contextGroupId());
+        if (!contextId) {
             *errorString = "Cannot find default execution context";
             return;
         }
-        contextId = mainInGroup->contextId();
     }
 
     InjectedScript* injectedScript = m_session->findInjectedScript(errorString, contextId);
     if (!injectedScript)
         return;
 
     v8::HandleScope scope(injectedScript->isolate());
     v8::Local<v8::Context> context = injectedScript->context()->context();
     v8::Context::Scope contextScope(context);
 
@@ skipping 434 matching lines @@
 
 void V8RuntimeAgentImpl::reportExecutionContextDestroyed(InspectedContext* context)
 {
     if (m_enabled && context->isReported()) {
         context->setReported(false);
         m_frontend->executionContextDestroyed(context->contextId());
     }
 }
 
 } // namespace blink