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

chrome/renderer/spellchecker/spellcheck.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.h"
 
 #include "base/file_util.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/spellcheck_common.h"
 #include "chrome/common/spellcheck_messages.h"
+#include "chrome/renderer/chrome_content_renderer_client.h"
 #include "third_party/hunspell/src/hunspell/hunspell.hxx"
 
 using base::TimeTicks;
 
-SpellCheck::SpellCheck()
+SpellCheck::SpellCheck(chrome::ChromeContentRendererClient* renderer_client)
     : file_(base::kInvalidPlatformFileValue),
       auto_spell_correct_turned_on_(false),
       is_using_platform_spelling_engine_(false),
-      initialized_(false) {
+      initialized_(false),
+      renderer_client_(renderer_client) {
   // Wait till we check the first word before doing any initializing.
 }
 
 SpellCheck::~SpellCheck() {
 }
 
 bool SpellCheck::OnControlMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(SpellCheck, message)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_Init, OnInit)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_WordAdded, OnWordAdded)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_EnableAutoSpellCorrect,
                         OnEnableAutoSpellCorrect)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   if (message.type() == ViewMsg_PurgeMemory::ID) {
-    delete this;
-    new SpellCheck();
+    if (renderer_client_) {

[jam, 2011/06/21 22:59:39]

ditto

[Greg Billock, 2011/06/22 15:58:35]

Done.

+      renderer_client_->ResetSpellCheck();
+    }
   }
 
   return handled;
 }
 
 void SpellCheck::OnInit(IPC::PlatformFileForTransit bdict_file,
                         const std::vector<std::string>& custom_words,
                         const std::string& language,
     bool auto_spell_correct) {
   Init(IPC::PlatformFileForTransitToPlatformFile(bdict_file),
@@ skipping 251 matching lines @@
 
   string16 word;
   int word_start;
   int word_length;
   while (word_iterator.GetNextWord(&word, &word_start, &word_length)) {
     if (!CheckSpelling(word, tag))
       return false;
   }
   return true;
 }