Linux sandbox: add basic Yama support

sandbox/linux/services/broker_process_unittest.cc

Index: sandbox/linux/services/broker_process_unittest.cc
diff --git a/sandbox/linux/services/broker_process_unittest.cc b/sandbox/linux/services/broker_process_unittest.cc
index cd50a6bf01e16953456d76642d733a3d90cf1266..f3effa1023accc1f5f9e0012ba4202813637e41d 100644
--- a/sandbox/linux/services/broker_process_unittest.cc
+++ b/sandbox/linux/services/broker_process_unittest.cc
@@ -65,12 +65,6 @@ bool NoOpCallback() { return true; }
 
 }  // namespace
 
-#if defined(OS_ANDROID)
-  #define DISABLE_ON_ANDROID(function) DISABLED_##function
-#else
-  #define DISABLE_ON_ANDROID(function) function
-#endif
-
 TEST(BrokerProcess, CreateAndDestroy) {
   std::vector<std::string> read_whitelist;
   read_whitelist.push_back("/proc/cpuinfo");