Move some files in base to base/memory.

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index fcf0b88bec9396bdd2e547ec198c20335a506882..1315c96208dc87f2348c87ff04fb28918abb76d8 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -99,9 +99,15 @@
         'json/string_escape_unittest.cc',
         'lazy_instance_unittest.cc',
         'linked_list_unittest.cc',
-        'linked_ptr_unittest.cc',
         'logging_unittest.cc',
         'mac/mac_util_unittest.mm',
+        'memory/linked_ptr_unittest.cc',
+        'memory/ref_counted_unittest.cc',
+        'memory/scoped_native_library_unittest.cc',
+        'memory/scoped_ptr_unittest.cc',
+        'memory/scoped_temp_dir_unittest.cc',
+        'memory/singleton_unittest.cc',
+        'memory/weak_ptr_unittest.cc',
         'message_loop_proxy_impl_unittest.cc',
         'message_loop_unittest.cc',
         'message_pump_glib_unittest.cc',
@@ -117,14 +123,9 @@
         'process_util_unittest_mac.h',
         'process_util_unittest_mac.mm',
         'rand_util_unittest.cc',
-        'ref_counted_unittest.cc',
-        'scoped_native_library_unittest.cc',
-        'scoped_ptr_unittest.cc',
-        'scoped_temp_dir_unittest.cc',
         'sha1_unittest.cc',
         'sha2_unittest.cc',
         'shared_memory_unittest.cc',
-        'singleton_unittest.cc',
         'stack_container_unittest.cc',
         'string16_unittest.cc',
         'string_number_conversions_unittest.cc',
@@ -167,7 +168,6 @@
         'values_unittest.cc',
         'version_unittest.cc',
         'vlog_unittest.cc',
-        'weak_ptr_unittest.cc',
         'win/event_trace_consumer_unittest.cc',
         'win/event_trace_controller_unittest.cc',
         'win/event_trace_provider_unittest.cc',