Remove the dependency of Extension API from tts_chromeos

chrome/browser/speech/extension_api/tts_engine_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_engine_extension_api.h"
 
 #include <string>
 
 #include "base/json/json_writer.h"
 #include "base/values.h"
+#include "chrome/browser/extensions/component_loader.h"
+#include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/speech/extension_api/tts_engine_extension_observer.h"
 #include "chrome/browser/speech/extension_api/tts_extension_api.h"
 #include "chrome/browser/speech/extension_api/tts_extension_api_constants.h"
 #include "chrome/browser/speech/tts_controller.h"
 #include "chrome/common/extensions/api/speech/tts_engine_manifest_handler.h"
+#include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/common/console_message_level.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_messages.h"
@@ skipping 177 matching lines @@
   scoped_ptr<extensions::Event> event(new extensions::Event(
       tts_engine_events::kOnResume, args.Pass()));
   Profile* profile = utterance->profile();
   event->restrict_to_browser_context = profile;
   EventRouter* event_router = EventRouter::Get(profile);
   std::string id = utterance->extension_id();
   event_router->DispatchEventToExtension(id, event.Pass());
   WarnIfMissingPauseOrResumeListener(profile, event_router, id);
 }
 
+bool TtsExtensionEngine::LoadBuiltInTtsExtension(Profile* profile) {
+#if defined(OS_CHROMEOS)
+  // Check to see if the engine was previously loaded.
+  if (TtsEngineExtensionObserver::GetInstance(profile)->SawExtensionLoad(
+          extension_misc::kSpeechSynthesisExtensionId, true)) {
+    return false;
+  }
+
+  // Load the component extension into this profile.
+  ExtensionService* extension_service =
+      extensions::ExtensionSystem::Get(profile)->extension_service();
+  DCHECK(extension_service);
+  extension_service->component_loader()
+      ->AddChromeOsSpeechSynthesisExtension();
+  return true;
+#else
+  return false;
+#endif
+}
+
 bool ExtensionTtsEngineSendTtsEventFunction::RunSync() {
   int utterance_id;
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &utterance_id));
 
   base::DictionaryValue* event;
   EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(1, &event));
 
   std::string event_type;
   EXTENSION_FUNCTION_VALIDATE(
       event->GetString(constants::kEventTypeKey, &event_type));
@@ skipping 51 matching lines @@
         utterance_id, TTS_EVENT_PAUSE, char_index, std::string());
   } else if (event_type == constants::kEventTypeResume) {
     controller->OnTtsEvent(
         utterance_id, TTS_EVENT_RESUME, char_index, std::string());
   } else {
     EXTENSION_FUNCTION_VALIDATE(false);
   }
 
   return true;
 }