Get main frame and subframe AppCache loads to work.

content/browser/appcache/appcache_request_handler.cc

Index: content/browser/appcache/appcache_request_handler.cc
diff --git a/content/browser/appcache/appcache_request_handler.cc b/content/browser/appcache/appcache_request_handler.cc
index 870fa7d35200c73a52989a24241190d1cd360aa3..5b5ba3365bb2007073ab4cd0dc2d634338942958 100644
--- a/content/browser/appcache/appcache_request_handler.cc
+++ b/content/browser/appcache/appcache_request_handler.cc
@@ -316,12 +316,22 @@ std::unique_ptr<AppCacheJob> AppCacheRequestHandler::MaybeLoadMainResource(
   // If a page falls into the scope of a ServiceWorker, any matching AppCaches
   // should be ignored. This depends on the ServiceWorker handler being invoked
   // prior to the AppCache handler.
-  if (ServiceWorkerRequestHandler::IsControlledByServiceWorker(
+  // TODO(ananta)
+  // We need to handle this for AppCache requests initiated for the network
+  // service
+  if (request_->GetURLRequest() &&
+      ServiceWorkerRequestHandler::IsControlledByServiceWorker(
           request_->GetURLRequest())) {
     host_->enable_cache_selection(false);
     return nullptr;
   }
 
+  if (service_->storage()->IsInitialized() &&

[michaeln, 2017/06/02 23:47:27]

Please use the storage() method to access the storage object, in exceptional
cases where corruption is discovered, the storage object can be swapped out.
Running documents/workers will continue to use the old storage object until they
are close. Whe latch onto the storage object for the lifetime of the
document/worker and store the reference in the host object (which is scoped to
the lifetime of the document/worker).

[ananta, 2017/06/03 01:55:56]

Done.

+      service_->storage()->usage_map()->find(request_->GetURL().GetOrigin()) ==
+          service_->storage()->usage_map()->end()) {
+    return nullptr;
+  }
+
   host_->enable_cache_selection(true);
 
   const AppCacheHost* spawning_host =