Prerender: Disable prefetch if there's an appcache.

content/browser/appcache/appcache_service_impl.cc

 // Copyright 2014 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/appcache/appcache_service_impl.h"
 
 #include <functional>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/browser/appcache/appcache.h"
 #include "content/browser/appcache/appcache_backend_impl.h"
 #include "content/browser/appcache/appcache_entry.h"
 #include "content/browser/appcache/appcache_executable_handler.h"
 #include "content/browser/appcache/appcache_histograms.h"
+#include "content/browser/appcache/appcache_interceptor.h"
 #include "content/browser/appcache/appcache_policy.h"
 #include "content/browser/appcache/appcache_quota_client.h"
+#include "content/browser/appcache/appcache_request_handler.h"
 #include "content/browser/appcache/appcache_response.h"
 #include "content/browser/appcache/appcache_service_impl.h"
 #include "content/browser/appcache/appcache_storage_impl.h"
 #include "net/base/completion_callback.h"
 #include "net/base/io_buffer.h"
 #include "storage/browser/quota/special_storage_policy.h"
 
 namespace content {
 
 namespace {
@@ skipping 485 matching lines @@
   DCHECK(backends_.find(backend_impl->process_id()) == backends_.end());
   backends_.insert(
       BackendMap::value_type(backend_impl->process_id(), backend_impl));
 }
 
 void AppCacheServiceImpl::UnregisterBackend(
     AppCacheBackendImpl* backend_impl) {
   backends_.erase(backend_impl->process_id());
 }
 
+// Static AppCacheService methods -------
+
+// static
+bool AppCacheService::URLRequestHasActiveAppCache(
+    const net::URLRequest* request) {
+  AppCacheRequestHandler* appcache_handle =
+      AppCacheInterceptor::GetHandler(request);
+  if (appcache_handle) {
+    int64_t appcache_id;
+    GURL unused_manifest_url;
+    appcache_handle->GetExtraResponseInfo(&appcache_id, &unused_manifest_url);
+    if (appcache_id != kAppCacheNoCacheId)
+      return true;
+  }
+  return false;
+}
+
 }  // namespace content