Get rid of the following dependencies from content:

content/renderer/render_thread.cc

 // Copyright (c) 2011 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 "content/renderer/render_thread.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 551 matching lines @@
 
   if (command_line.HasSwitch(switches::kPlaybackMode) ||
       command_line.HasSwitch(switches::kRecordMode) ||
       command_line.HasSwitch(switches::kNoJsRandomness)) {
     RegisterExtension(extensions_v8::PlaybackExtension::Get());
   }
 
   web_database_observer_impl_.reset(new WebDatabaseObserverImpl(this));
   WebKit::WebDatabase::setObserver(web_database_observer_impl_.get());
 
-  WebRuntimeFeatures::enableMediaPlayer(
-      RenderProcess::current()->HasInitializedMediaLibrary());
-
   WebRuntimeFeatures::enableSockets(
       !command_line.HasSwitch(switches::kDisableWebSockets));
 
   WebRuntimeFeatures::enableDatabase(
       !command_line.HasSwitch(switches::kDisableDatabases));
 
   WebRuntimeFeatures::enableDataTransferItems(
       !command_line.HasSwitch(switches::kDisableDataTransferItems));
 
   WebRuntimeFeatures::enableApplicationCache(
@@ skipping 35 matching lines @@
       !command_line.HasSwitch(switches::kDisableSpeechInput));
 
   WebRuntimeFeatures::enableFileSystem(
       !command_line.HasSwitch(switches::kDisableFileSystem));
 
   WebRuntimeFeatures::enableJavaScriptI18NAPI(
       !command_line.HasSwitch(switches::kDisableJavaScriptI18NAPI));
 
   WebRuntimeFeatures::enableQuota(true);
 
-  WebRuntimeFeatures::enableSpellCheckAPI(
-      !command_line.HasSwitch(switches::kDisableSpellcheckAPI));
-
   FOR_EACH_OBSERVER(RenderProcessObserver, observers_, WebKitInitialized());
 }
 
 void RenderThread::IdleHandler() {
 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
   MallocExtension::instance()->ReleaseFreeMemory();
 #endif
 
   v8::V8::IdleNotification();
 
@@ skipping 41 matching lines @@
 
 void RenderThread::RegisterExtension(v8::Extension* extension) {
   WebScriptController::registerExtension(extension);
   v8_extensions_.insert(extension->name());
 }
 
 bool RenderThread::IsRegisteredExtension(
     const std::string& v8_extension_name) const {
   return v8_extensions_.find(v8_extension_name) != v8_extensions_.end();
 }