Add dlmalloc from Bionic to the Chromium tree (DO NOT REVIEW).

third_party/android_debug_dlmalloc/chromium/dlmalloc.h

+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DLMALLOC_H_
+#define DLMALLOC_H_
+
+/* Configure dlmalloc. */
+#define HAVE_GETPAGESIZE 1
+#define HAVE_MMAP 1
+#define HAVE_MORECORE 0  // Don't use sbrk().
+#define MALLOC_INSPECT_ALL 1
+#define MSPACES 0
+#define REALLOC_ZERO_BYTES_FREES 1
+#define USE_LOCKS 1
+#define LOCK_AT_FORK 1
+#define USE_RECURSIVE_LOCK 0
+#define USE_SPIN_LOCKS 0
+
+/* Include the proper definitions. */
+#include "malloc.h"
+
+#endif  // DLMALLOC_H_