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

chrome/browser/chrome_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 "chrome/browser/chrome_content_browser_client.h"
 
 #include "base/command_line.h"
 #include "chrome/app/breakpad_mac.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/character_encoding.h"
 #include "chrome/browser/chrome_worker_message_filter.h"
+#include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/debugger/devtools_handler.h"
 #include "chrome/browser/desktop_notification_handler.h"
 #include "chrome/browser/extensions/extension_message_handler.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/printing/printing_message_filter.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/chrome_render_message_filter.h"
 #include "chrome/browser/renderer_host/chrome_render_view_host_observer.h"
 #include "chrome/browser/renderer_host/text_input_client_message_filter.h"
 #include "chrome/browser/search_engines/search_provider_install_state_message_filter.h"
 #include "chrome/browser/spellcheck_message_filter.h"
 #include "chrome/browser/ui/webui/chrome_web_ui_factory.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "content/browser/renderer_host/browser_render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/resource_context.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/browser/worker_host/worker_process_host.h"
 
 #if defined(OS_LINUX)
 #include "base/linux_util.h"
 #include "chrome/browser/crash_handler_host_linux.h"
 #endif  // OS_LINUX
 
 namespace chrome {
 
@@ skipping 132 matching lines @@
     // in the browser process.
     if (!g_browser_process->safe_browsing_detection_service())
       command_line->AppendSwitch(switches::kDisableClientSidePhishingDetection);
   }
 }
 
 std::string ChromeContentBrowserClient::GetApplicationLocale() {
   return g_browser_process->GetApplicationLocale();
 }
 
+bool ChromeContentBrowserClient::AllowAppCache(
+    const GURL& manifest_url, const content::ResourceContext* context) {
+  ContentSetting setting = context->host_content_settings_map()->
+      GetContentSetting(manifest_url, CONTENT_SETTINGS_TYPE_COOKIES, "");
+  DCHECK(setting != CONTENT_SETTING_DEFAULT);
+  return setting != CONTENT_SETTING_BLOCK;
+}
+
 #if defined(OS_LINUX)
 int ChromeContentBrowserClient::GetCrashSignalFD(
     const std::string& process_type) {
   if (process_type == switches::kRendererProcess)
     return RendererCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();
 
   if (process_type == switches::kPluginProcess)
     return PluginCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();
 
   if (process_type == switches::kPpapiPluginProcess)
     return PpapiCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();
 
   if (process_type == switches::kGpuProcess)
     return GpuCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();
 
   return -1;
 }
 #endif
 
 }  // namespace chrome