Clang/mac: Get unit_tests built.

chrome/browser/safe_browsing/safe_browsing_database_unittest.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.
 //
 // Unit tests for the SafeBrowsing storage system.
 
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 36 matching lines @@
  public:
   virtual void SetUp() {
     PlatformTest::SetUp();
 
     // Temporary directory for the database files.
     FilePath temp_dir;
     ASSERT_TRUE(file_util::CreateNewTempDirectory(kFolderPrefix, &temp_dir));
     file_deleter_.reset(new FileAutoDeleter(temp_dir));
 
     FilePath filename(temp_dir);
-    filename.AppendASCII("SafeBrowsingTestDatabase");
+    filename = filename.AppendASCII("SafeBrowsingTestDatabase");
 
     // In case it existed from a previous run.
     file_util::Delete(FilePath(filename.value() + kBloomSuffix), false);
     file_util::Delete(filename, false);
 
     database_.reset(SafeBrowsingDatabase::Create());
     database_->Init(filename);
   }
 
   virtual void TearDown() {
@@ skipping 1146 matching lines @@
 TEST(SafeBrowsingDatabase, DatabaseOldLotsofDeletesIO) {
   std::vector<ChunksInfo> chunks;
   std::vector<SBChunkDelete> deletes;
   SBChunkDelete del;
   del.is_sub_del = false;
   del.list_name = safe_browsing_util::kMalwareList;
   del.chunk_del.push_back(ChunkRange(3539, 3579));
   deletes.push_back(del);
   PerformUpdate(GetOldSafeBrowsingPath(), chunks, deletes);
 }