Initial switch to Chromium-style CHECK_* and DCHECK_* macros.

test/cctest/test-flags.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 237 matching lines @@
 
 TEST(FlagsRemoveIncomplete) {
   // Test that processed command line arguments are removed, even
   // if the list of arguments ends unexpectedly.
   SetFlagsToDefault();
   int argc = 3;
   const char* argv[] = { "", "--crankshaft", "--expose-debug-as" };
   CHECK_EQ(2, FlagList::SetFlagsFromCommandLine(&argc,
                                                 const_cast<char **>(argv),
                                                 true));
-  CHECK_NE(NULL, argv[1]);
+  CHECK(argv[1]);
   CHECK_EQ(argc, 2);
 }