Broaden valgrind supression for known issue in zlib. This seems

chrome/common/zip_unittest.cc

 // Copyright (c) 2006-2008 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 <set>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
@@ skipping 57 matching lines @@
     }
     EXPECT_EQ(count, zip_contents_.size());
   }
 
   // the path to temporary directory used to contain the test operations
   FilePath test_dir_;
 
   // hard-coded contents of a known zip file
   std::set<FilePath> zip_contents_;
 };
-// TODO(aa): re-enable this test for Mac (was disabled temporarily to clear
-// valgrind error on mac.
-#if !defined(OS_MACOSX)
+
 TEST_F(ZipTest, Unzip) {
   TestUnzipFile(FILE_PATH_LITERAL("test.zip"));
 }
 
 TEST_F(ZipTest, UnzipUncompressed) {
   TestUnzipFile(FILE_PATH_LITERAL("test_nocompress.zip"));
 }
 
 
 TEST_F(ZipTest, Zip) {
   FilePath src_dir;
   ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &src_dir));
   src_dir = src_dir.AppendASCII("zip").AppendASCII("test");
 
   FilePath zip_file;
   ASSERT_TRUE(file_util::CreateNewTempDirectory(
       FILE_PATH_LITERAL("unzip_unittest_"), &zip_file));
   zip_file = zip_file.AppendASCII("out.zip");
 
   EXPECT_TRUE(Zip(src_dir, zip_file));
 
   TestUnzipFile(zip_file);
 
   EXPECT_TRUE(file_util::Delete(zip_file, false));
 }
-#endif // !defined(OS_MACOSX)
+
 }  // namespace