Prerender: Disable prefetch if there's an appcache.

content/browser/appcache/appcache_service_impl.cc

Index: content/browser/appcache/appcache_service_impl.cc
diff --git a/content/browser/appcache/appcache_service_impl.cc b/content/browser/appcache/appcache_service_impl.cc
index 2978f4993077ccc99260e720f3c1b8c38749d117..854c6bd845c7cd77dce5dd7c1e1bf2dda01ef229 100644
--- a/content/browser/appcache/appcache_service_impl.cc
+++ b/content/browser/appcache/appcache_service_impl.cc
@@ -20,8 +20,10 @@
 #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"
@@ -527,4 +529,20 @@ void AppCacheServiceImpl::UnregisterBackend(
   backends_.erase(backend_impl->process_id());
 }
 
+// Static AppCacheService methods -------
+
+// static
+bool AppCacheService::URLRequestHasActiveAppCache(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