OS_LINUX and OS_ANDROID are mutually exclusive.

services/shell/runner/host/child_process_host.cc

Index: services/shell/runner/host/child_process_host.cc
diff --git a/services/shell/runner/host/child_process_host.cc b/services/shell/runner/host/child_process_host.cc
index f24fdcdd26eefe31dd01a997cdbc6594f3ea2927..30195b5404f6da9fc8c06e5386c1f7ecddb4a20b 100644
--- a/services/shell/runner/host/child_process_host.cc
+++ b/services/shell/runner/host/child_process_host.cc
@@ -26,7 +26,7 @@
 #include "services/shell/runner/common/client_util.h"
 #include "services/shell/runner/common/switches.h"
 
-#if defined(OS_LINUX) && !defined(OS_ANDROID)
+#if defined(OS_LINUX)
 #include "sandbox/linux/services/namespace_sandbox.h"
 #endif
 
@@ -177,7 +177,7 @@ void ChildProcessHost::DoLaunch(
 #endif
   DVLOG(2) << "Launching child with command line: "
            << child_command_line->GetCommandLineString();
-#if defined(OS_LINUX) && !defined(OS_ANDROID)
+#if defined(OS_LINUX)
   if (start_sandboxed_) {
     child_process_ =
         sandbox::NamespaceSandbox::LaunchProcess(*child_command_line, options);