Build nacl_helper_nonsfi with GN

content/BUILD.gn

Index: content/BUILD.gn
diff --git a/content/BUILD.gn b/content/BUILD.gn
index bf859909319c9798bf2e2a2ddf097c7d0e0daa6d..7ffa31cdba597be9c9288336c04cfa5dc8350727 100644
--- a/content/BUILD.gn
+++ b/content/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//tools/grit/grit_rule.gni")
+import("//build/config/nacl/config.gni")
 
 # Applied by targets internal to content.
 config("content_implementation") {
@@ -37,18 +38,21 @@ config("content_implementation") {
 # targets make sure the dependency goes through the content shared library
 # when doing a component build).
 
-content_shared_components = [
-  "//content/gpu:gpu_sources",
-  "//content/public/browser:browser_sources",
-  "//content/public/child:child_sources",
-  "//content/public/common:common_sources",
-  "//content/public/plugin:plugin_sources",
-  "//content/public/renderer:renderer_sources",
-  "//content/public/utility:utility_sources",
-]
+if (!is_nacl_nonsfi) {
+  content_shared_components = [
+    "//content/gpu:gpu_sources",
+    "//content/public/browser:browser_sources",
+    "//content/public/child:child_sources",
+    "//content/public/common:common_sources",
+    "//content/public/plugin:plugin_sources",
+    "//content/public/renderer:renderer_sources",
+    "//content/public/utility:utility_sources",
+  ]
 
-if (enable_plugins) {
-  content_shared_components += [ "//content/ppapi_plugin:ppapi_plugin_sources" ]
+  if (enable_plugins) {
+    content_shared_components +=
+        [ "//content/ppapi_plugin:ppapi_plugin_sources" ]
+  }
 }
 
 if (is_component_build) {
@@ -59,6 +63,23 @@ if (is_component_build) {
       "//build/config/sanitizers:deps",
     ]
   }
+} else if (is_nacl_nonsfi) {
+  source_set("content") {
+    set_sources_assignment_filter([])
+    sources = [
+      "common/sandbox_linux/sandbox_init_linux.cc",
+      "common/sandbox_linux/sandbox_seccomp_bpf_linux.cc",
+      "common/send_zygote_child_ping_linux.cc",
+      "public/common/content_switches.cc",
+    ]
+    set_sources_assignment_filter(sources_assignment_filter)
+
+    defines = [ "USE_SECCOMP_BPF=1" ]
+
+    deps = [
+      "//base",
+    ]
+  }
 } else {
   group("content") {
     deps = content_shared_components