mac: Make the (10.6-only) sandbox hole for the components build smaller

content/common/sandbox_mac_diraccess_unittest.mm

 // Copyright (c) 2012 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.
 
 #import <Cocoa/Cocoa.h>
 #include <dirent.h>
 
 extern "C" {
 #include <sandbox.h>
 }
@@ skipping 132 matching lines @@
 typedef scoped_ptr_malloc<FilePath, ScopedDirectoryDelete> ScopedDirectory;
 
 TEST_F(MacDirAccessSandboxTest, SandboxAccess) {
   using file_util::CreateDirectory;
 
   FilePath tmp_dir;
   ASSERT_TRUE(file_util::CreateNewTempDirectory("", &tmp_dir));
   // This step is important on OS X since the sandbox only understands "real"
   // paths and the paths CreateNewTempDirectory() returns are empirically in
   // /var which is a symlink to /private/var .
-  Sandbox::GetCanonicalSandboxPath(&tmp_dir);
+  tmp_dir = Sandbox::GetCanonicalSandboxPath(tmp_dir);
   ScopedDirectory cleanup(&tmp_dir);
 
   const char* sandbox_dir_cases[] = {
     "simple_dir_name",
     "^hello++ $",       // Regex.
     "\\^.$|()[]*+?{}",  // All regex characters.
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(sandbox_dir_cases); ++i) {
     const char* sandbox_dir_name = sandbox_dir_cases[i];
@@ skipping 135 matching lines @@
     PLOG(ERROR) << "Sandbox breach: was able to write ("
                 << denied_file2.value()
                 << ")";
     return -1;
   }
 
   return 0;
 }
 
 }  // namespace sandbox