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diff --git a/chromium/extensions/browser/renderer_startup_helper.h b/chromium/extensions/browser/renderer_startup_helper.h
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+++ b/chromium/extensions/browser/renderer_startup_helper.h
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+// 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.
+
+#ifndef EXTENSIONS_BROWSER_RENDERER_STARTUP_HELPER_H_
+#define EXTENSIONS_BROWSER_RENDERER_STARTUP_HELPER_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+namespace content {
+class BrowserContext;
+class RenderProcessHost;
+}
+
+namespace extensions {
+
+// Informs renderers about extensions-related data (loaded extensions, available
+// functions, etc.) when they start. Sends this information to both extension
+// and non-extension renderers, as the non-extension renderers may have content
+// scripts. Lives on the UI thread. Shared between incognito and non-incognito
+// browser contexts.
+class RendererStartupHelper : public KeyedService,
+                              public content::NotificationObserver {
+ public:
+  // This class sends messages to all renderers started for |browser_context|.
+  explicit RendererStartupHelper(content::BrowserContext* browser_context);
+  ~RendererStartupHelper() override;
+
+  // content::NotificationObserver overrides:
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
+
+ private:
+  content::BrowserContext* browser_context_;  // Not owned.
+
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererStartupHelper);
+};
+
+// Factory for RendererStartupHelpers. Declared here because this header is
+// rarely included and it's probably cheaper to put it here than to make the
+// compiler generate another object file.
+class RendererStartupHelperFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static RendererStartupHelper* GetForBrowserContext(
+      content::BrowserContext* context);
+  static RendererStartupHelperFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<RendererStartupHelperFactory>;
+
+  RendererStartupHelperFactory();
+  ~RendererStartupHelperFactory() override;
+
+  // BrowserContextKeyedServiceFactory implementation:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+  bool ServiceIsCreatedWithBrowserContext() const override;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererStartupHelperFactory);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_RENDERER_STARTUP_HELPER_H_