cc: Switch to Chromium DCHECKs and LOGs

cc/dcheck.h

Index: cc/dcheck.h
diff --git a/cc/dcheck.h b/cc/dcheck.h
new file mode 100644
index 0000000000000000000000000000000000000000..2b14b2c02cce2b3a7e4dc764068e73b78fc28d6d
--- /dev/null
+++ b/cc/dcheck.h
@@ -0,0 +1,23 @@
+// 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.
+
+#ifndef CC_DCHECK_H_
+#define CC_DCHECK_H_
+
+#include "base/logging.h"
+
+// TODO(danakj): If we can convince the world to remove the --enable-dchecks
+// command line option, and have a compiler flag available in cc/dcheck.h
+// to tell if DCHECKs will be compiled, then remove this file and replace
+// all CC_CC_DCHECK() calls with CC_DCHECK() instead.
+
+#define CC_DCHECK_ENABLED() (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
+
+#if CC_DCHECK_ENABLED()
+#define CC_DCHECK(a) DCHECK(a)
+#else
+#define CC_DCHECK(a)
+#endif
+
+#endif // CC_DCHECK_H_