Get rid of the following dependencies from content:

content/renderer/render_thread.cc

Index: content/renderer/render_thread.cc
===================================================================
--- content/renderer/render_thread.cc	(revision 88923)
+++ content/renderer/render_thread.cc	(working copy)
@@ -569,9 +569,6 @@
   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));
 
@@ -627,9 +624,6 @@
 
   WebRuntimeFeatures::enableQuota(true);
 
-  WebRuntimeFeatures::enableSpellCheckAPI(
-      !command_line.HasSwitch(switches::kDisableSpellcheckAPI));
-
   FOR_EACH_OBSERVER(RenderProcessObserver, observers_, WebKitInitialized());
 }