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 456 matching lines @@
         'logging_unittest.cc',
         'mac/bind_objc_block_unittest.mm',
         'mac/foundation_util_unittest.mm',
         'mac/libdispatch_task_runner_unittest.cc',
         'mac/mac_util_unittest.mm',
         'mac/objc_property_releaser_unittest.mm',
         'mac/scoped_nsobject_unittest.mm',
         'mac/scoped_sending_event_unittest.mm',
         'md5_unittest.cc',
         'memory/aligned_memory_unittest.cc',
-        'memory/discardable_memory_allocator_android_unittest.cc',
         'memory/discardable_memory_manager_unittest.cc',
         'memory/discardable_memory_unittest.cc',
         'memory/linked_ptr_unittest.cc',
         'memory/ref_counted_memory_unittest.cc',
         'memory/ref_counted_unittest.cc',
         'memory/scoped_ptr_unittest.cc',
         'memory/scoped_ptr_unittest.nc',
         'memory/scoped_vector_unittest.cc',
         'memory/shared_memory_unittest.cc',
         'memory/singleton_unittest.cc',
@@ skipping 261 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"', {

[willchan no longer on Chromium, 2014/04/30 06:38:21]

Can you explain why this is restricted to "target"? I am not familiar with this
conditional.

[Philippe, 2014/04/30 08:38:10]

David also asked about it in the first patch set. Let me paste my reply below:
On platforms where cross-compilation is used, we distinguish the target (Android
here) and the host (Linux). In an Android build we build libbase not only for
the target but also for the host since we have some standalone binaries
(depending on base) that we use as part of the build itself and for testing.

+          'sources': [
+            'memory/discardable_memory_ashmem_allocator_unittest.cc',
+          ],
+        }],
         ['OS == "android"', {
           'sources/': [
             ['include', '^debug/proc_maps_linux_unittest\\.cc$'],
           ],
         }],
       ],  # target_conditions
     },
     {
       'target_name': 'base_perftests',
       'type': '<(gtest_target_type)',
@@ skipping 678 matching lines @@
             'base_unittests.isolate',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }