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

content/browser/appcache/appcache_host.cc

Index: content/browser/appcache/appcache_host.cc
diff --git a/content/browser/appcache/appcache_host.cc b/content/browser/appcache/appcache_host.cc
index 3af81c5eef57a9a55e8d38147f0ef6ffa3f3d95a..ecfa39ca9a6fb5d2b2744d45c16be091d45a6b59 100644
--- a/content/browser/appcache/appcache_host.cc
+++ b/content/browser/appcache/appcache_host.cc
@@ -44,21 +44,26 @@ void FillCacheInfo(const AppCache* cache,
 
 }  // Anonymous namespace
 
-AppCacheHost::AppCacheHost(int host_id, AppCacheFrontend* frontend,
+AppCacheHost::AppCacheHost(int host_id,
+                           AppCacheFrontend* frontend,
                            AppCacheServiceImpl* service)
     : host_id_(host_id),
-      spawning_host_id_(kAppCacheNoHostId), spawning_process_id_(0),
-      parent_host_id_(kAppCacheNoHostId), parent_process_id_(0),
+      spawning_host_id_(kAppCacheNoHostId),
+      spawning_process_id_(0),
+      parent_host_id_(kAppCacheNoHostId),
+      parent_process_id_(0),
       pending_main_resource_cache_id_(kAppCacheNoCacheId),
       pending_selected_cache_id_(kAppCacheNoCacheId),
       was_select_cache_called_(false),
       is_cache_selection_enabled_(true),
-      frontend_(frontend), service_(service),
+      frontend_(frontend),
+      service_(service),
       storage_(service->storage()),
       pending_callback_param_(NULL),
       main_resource_was_namespace_entry_(false),
       main_resource_blocked_(false),
-      associated_cache_info_pending_(false) {
+      associated_cache_info_pending_(false),
+      weak_factory_(this) {
   service_->AddObserver(this);
 }
 
@@ -543,6 +548,10 @@ void AppCacheHost::CompleteTransfer(int host_id, AppCacheFrontend* frontend) {
   frontend_ = frontend;
 }
 
+base::WeakPtr<AppCacheHost> AppCacheHost::GetWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 void AppCacheHost::AssociateNoCache(const GURL& manifest_url) {
   // manifest url can be empty.
   AssociateCacheHelper(NULL, manifest_url);