Issue 11428116 had to be reverted as it broke build due to a unused variable.

chrome/browser/extensions/api/developer_private/developer_private_api_factory.h

Index: chrome/browser/extensions/api/developer_private/developer_private_api_factory.h
diff --git a/chrome/browser/extensions/api/developer_private/developer_private_api_factory.h b/chrome/browser/extensions/api/developer_private/developer_private_api_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..c1ef9f648a3879912b6fc1bafcf22cf99d855b9e
--- /dev/null
+++ b/chrome/browser/extensions/api/developer_private/developer_private_api_factory.h
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_DEVELOPER_PRIVATE_API_FACTORY_H_
+#define CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_DEVELOPER_PRIVATE_API_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/profiles/profile_keyed_service_factory.h"
+
+namespace extensions {
+
+class DeveloperPrivateAPI;
+
+// This is a singleton class which holds profileKeyed references to
+// DeveloperPrivateAPI class.
+class DeveloperPrivateAPIFactory : public ProfileKeyedServiceFactory {
+ public:
+  static DeveloperPrivateAPI* GetForProfile(Profile* profile);
+
+  static DeveloperPrivateAPIFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<DeveloperPrivateAPIFactory>;
+
+  DeveloperPrivateAPIFactory();
+  virtual ~DeveloperPrivateAPIFactory();
+
+  // ProfileKeyedServiceFactory implementation.
+  virtual ProfileKeyedService* BuildServiceInstanceFor(
+      Profile* profile) const OVERRIDE;
+  virtual bool ServiceRedirectedInIncognito() const OVERRIDE;
+  virtual bool ServiceIsCreatedWithProfile() const OVERRIDE;
+  virtual bool ServiceIsNULLWhileTesting() const OVERRIDE;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_DEVELOPER_PRIVATE_API_FACTORY_H_