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

third_party/android_debug_dlmalloc/dlmalloc.gyp

 # 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.
 
 {
   'targets': [
     {
-      'target_name': 'sudden_motion_sensor',
-      'type': 'static_library',
+      'target_name': 'dlmalloc',
+      'type': '<(component)',
+      'sources': [
+        'chromium/dlmalloc.cc',
+        'chromium/dlmalloc.h',
+        'chromium/malloc.h',
+      ],
       'dependencies': [
-        '<(DEPTH)/base/base.gyp:base',
-      ],
-      'sources': [
-        'sudden_motion_sensor_mac.cc',
-        'sudden_motion_sensor_mac.h',
+        '../../third_party/ashmem/ashmem.gyp:ashmem',
       ],
     },
   ],
 }