Loading from the "most appropiate" appcache.

webkit/appcache/web_application_cache_host_impl.cc

 // Copyright (c) 2010 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 "webkit/appcache/web_application_cache_host_impl.h"
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/lazy_instance.h"
 #include "base/string_util.h"
@@ skipping 138 matching lines @@
   const char* kFormatString = "Application Cache Error event: %s";
   std::string full_message = base::StringPrintf(kFormatString,
                                                 message.c_str());
   OnLogMessage(LOG_ERROR, full_message);
 
   status_ = cache_info_.is_complete ? IDLE : UNCACHED;
   client_->notifyEventListener(static_cast<EventID>(ERROR_EVENT));
 }
 
 void WebApplicationCacheHostImpl::willStartMainResourceRequest(
-    WebURLRequest& request) {
+    WebURLRequest& request, const WebFrame* frame) {
   request.setAppCacheHostID(host_id_);
 
   original_main_resource_url_ = ClearUrlRef(request.url());
 
   std::string method = request.httpMethod().utf8();
   is_get_method_ = (method == kHttpGETMethod);
   DCHECK(method == StringToUpperASCII(method));
+
+  CHECK(frame);  // just to see if this holds true or not on try bots?
+
+  if (frame) {
+    if (WebApplicationCacheHostImpl* parent = FromFrame(frame->parent()))
+      backend_->SetSpawningHostId(host_id_, parent->host_id());
+    else if (WebApplicationCacheHostImpl* opener = FromFrame(frame->opener()))
+      backend_->SetSpawningHostId(host_id_, opener->host_id());
+  }
 }
 
 void WebApplicationCacheHostImpl::willStartSubResourceRequest(
     WebURLRequest& request) {
   request.setAppCacheHostID(host_id_);
 }
 
 void WebApplicationCacheHostImpl::selectCacheWithoutManifest() {
   if (was_select_cache_called_)
     return;
@@ skipping 125 matching lines @@
     web_resources[i].isExplicit = resource_infos[i].is_explicit;
     web_resources[i].isManifest = resource_infos[i].is_manifest;
     web_resources[i].isForeign = resource_infos[i].is_foreign;
     web_resources[i].isFallback = resource_infos[i].is_fallback;
     web_resources[i].url = resource_infos[i].url;
   }
   resources->swap(web_resources);
 }
 
 }  // appcache namespace