Linux sandbox: add a new low-level broker process mechanism.

sandbox/linux/sandbox_linux.gypi

Index: sandbox/linux/sandbox_linux.gypi
diff --git a/sandbox/linux/sandbox_linux.gypi b/sandbox/linux/sandbox_linux.gypi
index 535fb8921effeb7044128c645030fe7c80c7d7b0..9283d6af57dd5131ed52ae4066a3a792a3402e51 100644
--- a/sandbox/linux/sandbox_linux.gypi
+++ b/sandbox/linux/sandbox_linux.gypi
@@ -13,6 +13,7 @@
       'type': 'none',
       'dependencies': [
         'suid_sandbox_client',
+        'sandbox_services',
       ],
       'conditions': [
         # Only compile in the seccomp mode 1 code for the flag combination
@@ -45,6 +46,7 @@
         'tests/unit_tests.cc',
         'tests/unit_tests.h',
         'suid/client/setuid_sandbox_client_unittest.cc',
+        'services/broker_process_unittest.cc',
       ],
       'include_dirs': [
         '../..',
@@ -113,7 +115,22 @@
         '../..',
       ],
     },
+    { 'target_name': 'sandbox_services',
+      'type': 'static_library',
+      'sources': [
+        'services/broker_process.cc',
+        'services/broker_process.h',
+      ],
+      'dependencies': [
+        '../base/base.gyp:base',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+    },
     {
+      # We make this its own target so that it does not interfere
+      # with our tests.
       'target_name': 'libc_urandom_override',
       'type': 'static_library',
       'sources': [