Have AppCache code go through the content embedder API for content settings checks.

content/browser/content_browser_client.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 "content/browser/content_browser_client.h"
 
 #include "base/memory/singleton.h"
 #include "content/browser/webui/empty_web_ui_factory.h"
 #include "googleurl/src/gurl.h"
 
@@ skipping 34 matching lines @@
 }
 
 void ContentBrowserClient::AppendExtraCommandLineSwitches(
     CommandLine* command_line, int child_process_id) {
 }
 
 std::string ContentBrowserClient::GetApplicationLocale() {
   return std::string();
 }
 
+bool ContentBrowserClient::AllowAppCache(
+    const GURL& manifest_url, const content::ResourceContext* context) {
+  return true;
+}
+
 #if defined(OS_LINUX)
 int ContentBrowserClient::GetCrashSignalFD(const std::string& process_type) {
   return -1;
 }
 #endif
 
 }  // namespace content