Add support for subresource request fallback in AppCache for the network service..

content/browser/appcache/appcache_url_loader_request.cc

Index: content/browser/appcache/appcache_url_loader_request.cc
diff --git a/content/browser/appcache/appcache_url_loader_request.cc b/content/browser/appcache/appcache_url_loader_request.cc
index 11c85ba497b80b8c979f9f8541e20730b2345d77..4669be97d1549279b6b824ed450ffb90ea486a25 100644
--- a/content/browser/appcache/appcache_url_loader_request.cc
+++ b/content/browser/appcache/appcache_url_loader_request.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "content/browser/appcache/appcache_url_loader_request.h"
+#include "content/public/common/resource_type.h"
 #include "net/url_request/url_request.h"
 
 namespace content {
@@ -33,7 +34,8 @@ const GURL AppCacheURLLoaderRequest::GetReferrer() const {
 }
 
 bool AppCacheURLLoaderRequest::IsSuccess() const {
-  return false;
+  int response_code = GetResponseCode();
+  return (response_code >= 200 && response_code <= 226);
 }
 
 bool AppCacheURLLoaderRequest::IsCancelled() const {
@@ -45,6 +47,8 @@ bool AppCacheURLLoaderRequest::IsError() const {
 }
 
 int AppCacheURLLoaderRequest::GetResponseCode() const {
+  if (response_.headers)
+    return response_.headers->response_code();
   return 0;
 }
 
@@ -57,6 +61,10 @@ ResourceRequest* AppCacheURLLoaderRequest::GetResourceRequest() {
   return &request_;
 }
 
+AppCacheURLLoaderRequest* AppCacheURLLoaderRequest::AsURLLoaderRequest() {
+  return this;
+}
+
 AppCacheURLLoaderRequest::AppCacheURLLoaderRequest(
     const ResourceRequest& request)
     : request_(request) {}