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

chrome/renderer/spellchecker/spellcheck_provider.h

 // 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.
 
 #ifndef CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_PROVIDER_H_
 #define CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_PROVIDER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 35 matching lines @@
   size_t pending_text_request_size() const {
     return text_check_completions_.size();
   }
 
   int document_tag() const { return document_tag_; }
 
   // RenderViewObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message);
   virtual void FocusedNodeChanged(const WebKit::WebNode& node);
 
+  void SetSpellCheck(SpellCheck* spellcheck);
+
  private:
   // WebKit::WebSpellCheckClient implementation.
   virtual void spellCheck(
       const WebKit::WebString& text,
       int& offset,
       int& length,
       WebKit::WebVector<WebKit::WebString>* optional_suggestions);
   virtual void requestCheckingOfText(
       const WebKit::WebString& text,
       WebKit::WebTextCheckingCompletion* completion);
@@ skipping 28 matching lines @@
   // True if the browser is showing the spelling panel for us.
   bool spelling_panel_visible_;
 
   // Spellcheck implementation for use. Weak reference.
   SpellCheck* spellcheck_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellCheckProvider);
 };
 
 #endif  // CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_PROVIDER_H_