ServiceWorker: Read the blob from SW's response to a fetch event

content/renderer/service_worker/embedded_worker_context_client.cc

 // Copyright 2013 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 "content/renderer/service_worker/embedded_worker_context_client.h"
 
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/pickle.h"
 #include "base/strings/string16.h"
@@ skipping 240 matching lines @@
   const blink::WebVector<blink::WebString>& header_keys =
       web_response.getHeaderKeys();
   for (size_t i = 0; i < header_keys.size(); ++i) {
     const base::string16& key = header_keys[i];
     headers[base::UTF16ToUTF8(key)] =
         base::UTF16ToUTF8(web_response.getHeader(key));
   }
   ServiceWorkerResponse response(web_response.status(),
                                  web_response.statusText().utf8(),
                                  headers,
-                                 std::string());
+                                 web_response.blobUUID().utf8());
   script_context_->DidHandleFetchEvent(
       request_id, SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE, response);
 }
 
 void EmbeddedWorkerContextClient::didHandleSyncEvent(int request_id) {
   DCHECK(script_context_);
   script_context_->DidHandleSyncEvent(request_id);
 }
 
 blink::WebServiceWorkerNetworkProvider*
@@ skipping 38 matching lines @@
 }
 
 void EmbeddedWorkerContextClient::SendWorkerStarted() {
   DCHECK(worker_task_runner_->RunsTasksOnCurrentThread());
   Send(new EmbeddedWorkerHostMsg_WorkerStarted(
       WorkerTaskRunner::Instance()->CurrentWorkerId(),
       embedded_worker_id_));
 }
 
 }  // namespace content