[ServiceWorkerCache] Put should replace an existing entry to meet spec.

content/browser/service_worker/service_worker_cache.cc

 // Copyright 2014 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/browser/service_worker/service_worker_cache.h"
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/guid.h"
@@ skipping 799 matching lines @@
 
 // static
 void ServiceWorkerCache::PutImpl(scoped_ptr<PutContext> put_context) {
   if (!put_context->cache || !put_context->cache->backend_) {
     put_context->callback.Run(ErrorTypeStorage,
                               scoped_ptr<ServiceWorkerResponse>(),
                               scoped_ptr<storage::BlobDataHandle>());
     return;
   }
 
+  ServiceWorkerFetchRequest* request_ptr = put_context->request.get();
+  disk_cache::Backend* backend_ptr = put_context->cache->backend_.get();
+
+  net::CompletionCallback doom_entry_callback =
+      base::Bind(PutDidDoomEntry, base::Passed(put_context.Pass()));
+
+  int rv = backend_ptr->DoomEntry(request_ptr->url.spec(), doom_entry_callback);
+  if (rv != net::ERR_IO_PENDING)
+    doom_entry_callback.Run(rv);
+}
+
+// static
+void ServiceWorkerCache::PutDidDoomEntry(scoped_ptr<PutContext> put_context,
+                                         int doom_rv) {
+  if (!put_context->cache || !put_context->cache->backend_) {
+    put_context->callback.Run(ErrorTypeStorage,
+                              scoped_ptr<ServiceWorkerResponse>(),
+                              scoped_ptr<storage::BlobDataHandle>());
+  }
+
   disk_cache::Entry** entry_ptr = &put_context->cache_entry;
   ServiceWorkerFetchRequest* request_ptr = put_context->request.get();
   disk_cache::Backend* backend_ptr = put_context->cache->backend_.get();
 
   net::CompletionCallback create_entry_callback =
       base::Bind(PutDidCreateEntry, base::Passed(put_context.Pass()));
 
   int create_rv = backend_ptr->CreateEntry(
       request_ptr->url.spec(), entry_ptr, create_entry_callback);
 
@@ skipping 264 matching lines @@
   initialized_ = true;
   for (std::vector<base::Closure>::iterator it = init_callbacks_.begin();
        it != init_callbacks_.end();
        ++it) {
     it->Run();
   }
   init_callbacks_.clear();
 }
 
 }  // namespace content