Making pointer Unretained since it will be used on a different thread.

BUG=158555
TEST=open new chrome, click "sign in", in login box type "box." -- should not crash


Review URL: https://chromiumcodereview.appspot.com/11363107

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166283 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/spellchecker/spellcheck_hunspell_dictionary.cc

@@ -180,7 +180,7 @@ void SpellcheckHunspellDictionary::OnURLFetchComplete(
   dictionary_saved_ = false;
   BrowserThread::PostTaskAndReply(BrowserThread::FILE, FROM_HERE,
       base::Bind(&SpellcheckHunspellDictionary::SaveDictionaryData,
-                 weak_ptr_factory_.GetWeakPtr(), base::Owned(data)),
+                 base::Unretained(this), base::Owned(data)),
       base::Bind(&SpellcheckHunspellDictionary::SaveDictionaryDataComplete,
                  weak_ptr_factory_.GetWeakPtr()));
 }