Helpful checks.cc file is being helpful.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1276843004

Cr-Commit-Position: refs/heads/master@{#30046}

BUILD.gn

@@ -638,7 +638,6 @@ source_set("v8_base") {
     "src/char-predicates.cc",
     "src/char-predicates-inl.h",
     "src/char-predicates.h",
-    "src/checks.cc",
     "src/checks.h",
     "src/circular-queue-inl.h",
     "src/circular-queue.h",

src/checks.cc

-// Copyright 2006-2008 the V8 project 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 "src/checks.h"
-
-namespace v8 {
-namespace internal {}  // namespace internal
-}  // namespace v8

tools/gyp/v8.gyp

@@ -429,7 +429,6 @@
         '../../src/char-predicates.cc',
         '../../src/char-predicates-inl.h',
         '../../src/char-predicates.h',
-        '../../src/checks.cc',
         '../../src/checks.h',
         '../../src/circular-queue-inl.h',
         '../../src/circular-queue.h',