Forward handling of low-mem message to the content renderer client. Add APIs to handle this case.

chrome/renderer/spellchecker/spellcheck_provider.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 "chrome/renderer/spellchecker/spellcheck_provider.h"
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
@@ skipping 184 matching lines @@
   // TODO(darin): There's actually no reason for this to be here.  We should
   // have the browser side manage the document tag.
 #if defined(OS_MACOSX)
   if (!has_document_tag_) {
     // Make the call to get the tag.
     Send(new SpellCheckHostMsg_GetDocumentTag(routing_id(), &document_tag_));
     has_document_tag_ = true;
   }
 #endif
 }
+
+void SpellCheckProvider::SetSpellCheck(SpellCheck* spellcheck) {
+  spellcheck_ = spellcheck;
+}