Filter out a few more files from NaCl build of base/

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index 0c6ee7ebc1f9244b34d32ac1c90583ce527c5b0a..1d19597ee22f1b922c18886ef0c570c7224d2b51 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -779,6 +779,7 @@
                'allocator/type_profiler_control.h',
                'base_paths.cc',
                'cpu.cc',
+               'debug/stack_trace.cc',
                'debug/stack_trace_posix.cc',
                'files/file_enumerator_posix.cc',
                'files/file_path_watcher_fsevents.cc',
@@ -789,17 +790,22 @@
                'files/file_util.cc',
                'files/file_util_posix.cc',
                'files/file_util_proxy.cc',
+               'files/important_file_writer.cc',
                'memory/shared_memory_posix.cc',
                'native_library_posix.cc',
                'path_service.cc',
                'posix/unix_domain_socket_linux.cc',
+               'process/kill.cc',
                'process/kill_posix.cc',
+               'process/launch.cc',
                'process/launch_posix.cc',
+               'process/process_metrics.cc',
                'process/process_metrics_posix.cc',
                'process/process_posix.cc',
                'rand_util_posix.cc',
                'scoped_native_library.cc',
                'files/scoped_temp_dir.cc',
+               'sys_info.cc',
                'sys_info_posix.cc',
                'third_party/dynamic_annotations/dynamic_annotations.c',
             ],