Use DiscardableMemoryManager on Android.

base/base.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 787 matching lines @@
           'sources/': [
             # Pull in specific Mac files for iOS (which have been filtered out
             # by file name rules).
             ['include', '^mac/bind_objc_block_unittest\\.mm$'],
             ['include', '^mac/foundation_util_unittest\\.mm$',],
             ['include', '^mac/objc_property_releaser_unittest\\.mm$'],
             ['include', '^mac/scoped_nsobject_unittest\\.mm$'],
             ['include', '^sys_string_conversions_mac_unittest\\.mm$'],
           ],
         }],
+        ['OS == "android" and _toolset == "target"', {
+          'sources': [
+            'memory/discardable_memory_allocation_ashmem_factory_unittest.cc',
+          ],
+        }],
         ['OS == "android"', {
           'sources/': [
             ['include', '^debug/proc_maps_linux_unittest\\.cc$'],
           ],
         }],
       ],  # target_conditions
     },
     {
       'target_name': 'base_perftests',
       'type': '<(gtest_target_type)',
@@ skipping 657 matching lines @@
             'base_unittests.isolate',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }