Move shared_memory into base/memory subdirectory.

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index ce7f7e847f2938a9d393cac86d59d43a351c2521..d6f434beb8f7a8554f1554952a6d3e4cfd3d348e 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -272,6 +272,11 @@
           'memory/scoped_policy.h',
           'memory/scoped_ptr.h',
           'memory/scoped_vector.h',
+          'memory/shared_memory.h',
+          'memory/shared_memory_android.cc',
+          'memory/shared_memory_nacl.cc',
+          'memory/shared_memory_posix.cc',
+          'memory/shared_memory_win.cc',
           'memory/singleton.cc',
           'memory/singleton.h',
           'memory/weak_ptr.cc',
@@ -383,11 +388,6 @@
           'sha1.h',
           'sha1_portable.cc',
           'sha1_win.cc',
-          'shared_memory.h',
-          'shared_memory_android.cc',
-          'shared_memory_nacl.cc',
-          'shared_memory_posix.cc',
-          'shared_memory_win.cc',
           'single_thread_task_runner.h',
           'stl_util.h',
           'string_piece.cc',
@@ -625,6 +625,7 @@
                'file_util_posix.cc',
                'file_util_proxy.cc',
                'files/file_path_watcher_kqueue.cc',
+               'memory/shared_memory_posix.cc',
                'native_library_posix.cc',
                'path_service.cc',
                'platform_file_posix.cc',
@@ -635,7 +636,6 @@
                'rand_util_posix.cc',
                'scoped_native_library.cc',
                'files/scoped_temp_dir.cc',
-               'shared_memory_posix.cc',
                'sys_info_posix.cc',
                'threading/sequenced_worker_pool.cc',
                'third_party/dynamic_annotations/dynamic_annotations.c',