Speculative fix for crash in DOMUIThumbnailSource.

chrome/browser/dom_ui/chrome_url_data_manager.cc

 // Copyright (c) 2010 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/browser/dom_ui/chrome_url_data_manager.h"
 
 #include "app/l10n_util.h"
 #include "base/file_util.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
+#include "base/ref_counted_memory.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/values.h"
 #if defined(OS_WIN)
 #include "base/win_util.h"
 #endif
 #include "chrome/browser/appcache/view_appcache_internals_job_factory.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_thread.h"
@@ skipping 241 matching lines @@
   PendingRequestMap::iterator i = pending_requests_.find(request_id);
   if (i != pending_requests_.end()) {
     // We acquire a reference to the job so that it doesn't disappear under the
     // feet of any method invoked here (we could trigger a callback).
     scoped_refptr<URLRequestChromeJob> job = i->second;
     pending_requests_.erase(i);
     job->DataAvailable(bytes);
   }
 }
 
+ChromeURLDataManager::DataSource::DataSource(const std::string& source_name,
+                                             MessageLoop* message_loop)
+    : source_name_(source_name), message_loop_(message_loop) {
+}
+
+ChromeURLDataManager::DataSource::~DataSource() {
+}
+
 void ChromeURLDataManager::DataSource::SendResponse(
     RequestID request_id,
     RefCountedMemory* bytes) {
   ChromeThread::PostTask(
       ChromeThread::IO, FROM_HERE,
       NewRunnableMethod(Singleton<ChromeURLDataManager>::get(),
                         &ChromeURLDataManager::DataAvailable,
                         request_id, scoped_refptr<RefCountedMemory>(bytes)));
 }
 
@@ skipping 126 matching lines @@
                                       net::ERR_INVALID_URL));
   }
 }
 
 URLRequestChromeFileJob::URLRequestChromeFileJob(URLRequest* request,
                                                  const FilePath& path)
     : URLRequestFileJob(request, path) {
 }
 
 URLRequestChromeFileJob::~URLRequestChromeFileJob() { }