Make http_server part of the sdk.

mojo/services/http_server/public/cpp/BUILD.gn

Index: mojo/services/http_server/public/cpp/BUILD.gn
diff --git a/mojo/services/geometry/public/cpp/BUILD.gn b/mojo/services/http_server/public/cpp/BUILD.gn
similarity index 74%
copy from mojo/services/geometry/public/cpp/BUILD.gn
copy to mojo/services/http_server/public/cpp/BUILD.gn
index c05b8d36b40602a4ef4ffa2fe327176aacefc1ea..a24f006329faa911d5b73109861dffc99970d0c4 100644
--- a/mojo/services/geometry/public/cpp/BUILD.gn
+++ b/mojo/services/http_server/public/cpp/BUILD.gn
@@ -9,10 +9,16 @@ mojo_sdk_source_set("cpp") {
   restrict_external_deps = false
   public_configs = [ "../../../public/build/config:mojo_services" ]
   sources = [
-    "geometry_util.h",
+    "http_server_util.h",
+    "lib/http_server_util.cc",
   ]
 
   deps = [
     "../interfaces",
   ]
+
+  mojo_sdk_deps = [
+    "mojo/public/cpp/environment",
+    "mojo/public/cpp/system",
+  ]
 }