Revert "Fix a ton of compiler warnings."

chrome/browser/spellchecker.cc

 // Copyright (c) 2006-2009 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 "app/l10n_util.h"
 #include "chrome/browser/spellchecker.h"
 #include "chrome/browser/spellchecker_common.h"
 #include "chrome/browser/spellchecker_platform_engine.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 529 matching lines @@
     return;
 
   int word_length = static_cast<int>(word.size());
   if (word_length < 2 || word_length > kMaxAutoCorrectWordSize)
     return;
 
   wchar_t misspelled_word[kMaxAutoCorrectWordSize + 1];
   const wchar_t* word_char = word.c_str();
   for (int i = 0; i <= kMaxAutoCorrectWordSize; i++) {
     if (i >= word_length)
-      misspelled_word[i] = 0;
+      misspelled_word[i] = NULL;
     else
       misspelled_word[i] = word_char[i];
   }
 
   // Swap adjacent characters and spellcheck.
   int misspelling_start, misspelling_len;
   for (int i = 0; i < word_length - 1; i++) {
     // Swap.
     std::swap(misspelled_word[i], misspelled_word[i + 1]);
 
@@ skipping 210 matching lines @@
 
   // Populate the vector of WideStrings.
   for (int i = 0; i < number_of_suggestions; i++) {
     if (i < kMaxSuggestions)
       optional_suggestions->push_back(UTF8ToWide(suggestions[i]));
     free(suggestions[i]);
   }
   if (suggestions != NULL)
     free(suggestions);
 }