Purge unpinned ashmem before parsing /proc/$pid/smaps.

tools/android/purge_ashmem/purge_ashmem.gyp

-# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Copyright 2013 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': 'memdump',
+      'target_name': 'purge_ashmem',
       'type': 'executable',
       'dependencies': [
-        '../../../base/base.gyp:base',
+        '../../../third_party/ashmem/ashmem.gyp:ashmem',
       ],
       'conditions': [
         # Warning: A PIE tool cannot run on ICS 4.0.4, so only
         #          build it as position-independent when ASAN
         #          is activated. See b/6587214 for details.
         [ 'asan==1', {
           'cflags': [
             '-fPIE',
           ],
           'ldflags': [
             '-pie',
           ],
         }],
       ],
       'sources': [
-        'memdump.cc',
+        'purge_ashmem.c',
       ],
     },
   ],
 }