Check for NULL pointer before assigning the test data

content/common/sandbox_mac_unittest_helper.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_COMMON_SANDBOX_MAC_UNITTEST_HELPER_H_
 #define CONTENT_COMMON_SANDBOX_MAC_UNITTEST_HELPER_H_
 #pragma once
 
 #include "base/test/multiprocess_test.h"
 #include "content/common/sandbox_mac.h"
@@ skipping 29 matching lines @@
 //                    "TestCaseThatRunsInSandboxedSubprocess",
 //                    NULL));
 //  }
 
 // Base test type with helper functions to spawn a subprocess that exercises
 // a given test in the sandbox.
 class MacSandboxTest : public base::MultiProcessTest {
  public:
   // Runs a test specified by |test_name| in a sandbox of the type specified
   // by |sandbox_type|. |test_data| is a custom string that a test can pass
-  // to the child process runing in the sandbox.
+  // to the child process runing in the sandbox, or NULL if additional data is
+  // required.
   // Returns true if the test passes, false if either of the functions in
   // the corresponding MacSandboxTestCase return false.
   bool RunTestInSandbox(sandbox::Sandbox::SandboxProcessType sandbox_type,
                         const char* test_name,
                         const char* test_data);
 
   // Runs the test specified by |test_name| in all the different sandbox types,
   // one by one.
   // Returns true if the test passes, false if either of the functions in
   // the corresponding MacSandboxTestCase return false in any of the spawned
@@ skipping 47 matching lines @@
   namespace { \
     sandboxtest::internal::RegisterSandboxTest<class_name> \
       register_test##class_name(#class_name); \
   }  // namespace
 
 }  // namespace internal
 
 }  // namespace sandboxtest
 
 #endif  // CONTENT_COMMON_SANDBOX_MAC_UNITTEST_HELPER_H_