[CacheStorage] Check doomed caches first when dropping cache handles

content/browser/cache_storage/cache_storage_manager_unittest.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/cache_storage/cache_storage_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 530 matching lines @@
   std::unique_ptr<storage::BlobDataHandle> data_handle =
       std::move(callback_data_handle_);
 
   EXPECT_TRUE(Delete(origin1_, "foo"));
   // The cache is deleted but the handle to one of its entries is still
   // open. Creating a new cache in the same directory would fail on Windows.
   EXPECT_TRUE(Open(origin1_, "foo"));
   EXPECT_TRUE(CachePut(callback_cache_handle_->value(), kTestURL));
 }
 
+TEST_P(CacheStorageManagerTestP, DropRefAfterNewCacheWithSameNameCreated) {
+  // Make sure that dropping the final cache handle to a doomed cache doesn't
+  // affect newer caches with the same name. (see crbug.com/631467)
+
+  // 1. Create cache A and hang onto the handle
+  const GURL kTestURL = GURL("http://example.com/foo");
+  EXPECT_TRUE(Open(origin1_, "foo"));
+  EXPECT_FALSE(CacheMatch(callback_cache_handle_->value(), kTestURL));
+  std::unique_ptr<CacheStorageCacheHandle> cache_handle =
+      std::move(callback_cache_handle_);
+
+  // 2. Doom the cache
+  EXPECT_TRUE(Delete(origin1_, "foo"));
+
+  // 3. Create cache B (with the same name)
+  EXPECT_TRUE(Open(origin1_, "foo"));
+  EXPECT_FALSE(CacheMatch(callback_cache_handle_->value(), kTestURL));
+
+  // 4. Drop handle to A
+  cache_handle.reset();
+
+  // 5. Verify that B still works
+  EXPECT_FALSE(CacheMatch(callback_cache_handle_->value(), kTestURL));
+}
+
 TEST_P(CacheStorageManagerTestP, StorageMatchAllEntryExistsTwice) {
   EXPECT_TRUE(Open(origin1_, "foo"));
   EXPECT_TRUE(CachePutWithStatusCode(callback_cache_handle_->value(),
                                      GURL("http://example.com/foo"), 200));
   EXPECT_TRUE(Open(origin1_, "bar"));
   EXPECT_TRUE(CachePutWithStatusCode(callback_cache_handle_->value(),
                                      GURL("http://example.com/foo"), 201));
 
   EXPECT_TRUE(StorageMatchAll(origin1_, GURL("http://example.com/foo")));
 
@@ skipping 689 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(CacheStorageManagerTests,
                         CacheStorageManagerTestP,
                         ::testing::Values(false, true));
 
 INSTANTIATE_TEST_CASE_P(CacheStorageQuotaClientTests,
                         CacheStorageQuotaClientTestP,
                         ::testing::Values(false, true));
 
 }  // namespace content