Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/memory_region_map.cc

Index: third_party/tcmalloc/chromium/src/memory_region_map.cc
diff --git a/third_party/tcmalloc/chromium/src/memory_region_map.cc b/third_party/tcmalloc/chromium/src/memory_region_map.cc
index 912ac8c4cb6bdf61c8f71db899910036dbb2d8fb..f1f8bb108929a8415530459cbf8f106e7593dc86 100644
--- a/third_party/tcmalloc/chromium/src/memory_region_map.cc
+++ b/third_party/tcmalloc/chromium/src/memory_region_map.cc
@@ -1,10 +1,10 @@
 /* Copyright (c) 2006, Google Inc.
  * All rights reserved.
- * 
+ *

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

nit: unnecessary deletion

  * 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
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR