Allow manifest handlers to declare keys they depend on that must be parsed before them.

chrome/browser/speech/extension_api/tts_extension_api.cc

 // 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.
 
 #include "chrome/browser/speech/extension_api/tts_extension_api.h"
 
 #include <string>
 
 #include "base/lazy_instance.h"
 #include "base/values.h"
@@ skipping 169 matching lines @@
   return true;
 }
 
 // static
 TtsAPI* TtsAPI::Get(Profile* profile) {
   return ProfileKeyedAPIFactory<TtsAPI>::GetForProfile(profile);
 }
 
 TtsAPI::TtsAPI(Profile* profile) {
   ManifestHandler::Register(extension_manifest_keys::kTtsEngine,
-                            new TtsEngineManifestHandler);
+                            make_linked_ptr(new TtsEngineManifestHandler));
   ExtensionFunctionRegistry* registry =
       ExtensionFunctionRegistry::GetInstance();
   registry->RegisterFunction<ExtensionTtsEngineSendTtsEventFunction>();
   registry->RegisterFunction<TtsGetVoicesFunction>();
   registry->RegisterFunction<TtsIsSpeakingFunction>();
   registry->RegisterFunction<TtsSpeakFunction>();
   registry->RegisterFunction<TtsStopSpeakingFunction>();
 }
 
 TtsAPI::~TtsAPI() {
 }
 
 static base::LazyInstance<ProfileKeyedAPIFactory<TtsAPI> >
 g_factory = LAZY_INSTANCE_INITIALIZER;
 
 ProfileKeyedAPIFactory<TtsAPI>* TtsAPI::GetFactoryInstance() {
   return &g_factory.Get();
 }
 
 }  // namespace extensions