Disk cache: fix a unit test for Linux....

net/disk_cache/backend_unittest.cc

 // Copyright (c) 2006-2010 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 "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/platform_thread.h"
 #include "base/string_util.h"
 #include "net/base/io_buffer.h"
@@ skipping 223 matching lines @@
 
     entry->Close();
 
     // The cache destructor will see one pending operation here.
     delete cache;
   }
 
   MessageLoop::current()->RunAllPending();
 }
 
-#if defined(OS_WIN) || defined(OS_MACOSX)
-// This test fails on linux. TODO(rvargas): Find out why (bug 41563).
 TEST_F(DiskCacheTest, TruncatedIndex) {
   FilePath path = GetCacheFilePath();
   ASSERT_TRUE(DeleteCache(path));
-  FilePath index = path.AppendASCII("Index");
+  FilePath index = path.AppendASCII("index");
   ASSERT_EQ(5, file_util::WriteFile(index, "hello", 5));
   scoped_ptr<disk_cache::Backend> backend;
   backend.reset(disk_cache::BackendImpl::CreateBackend(path, false, 0,
                                                        net::DISK_CACHE,
                                                        disk_cache::kNone));
   ASSERT_TRUE(backend.get() == NULL);
 }
-#endif
 
 void DiskCacheBackendTest::BackendSetSize() {
   SetDirectMode();
   const int cache_size = 0x10000;  // 64 kB
   SetMaxSize(cache_size);
   InitCache();
 
   std::string first("some key");
   std::string second("something else");
   disk_cache::Entry* entry;
@@ skipping 1347 matching lines @@
             disk_cache::PreferedCacheSize(large_size * 250));
   EXPECT_EQ(kint32max - 1,
             disk_cache::PreferedCacheSize(largest_size * 100 - 1));
 
   // Region 6: expected = kint32max
   EXPECT_EQ(kint32max,
             disk_cache::PreferedCacheSize(largest_size * 100));
   EXPECT_EQ(kint32max,
             disk_cache::PreferedCacheSize(largest_size * 10000));
 }