Expose ability to download network service impl in SDK.

mojo/public/mojo_application.gni

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/module_args/mojo.gni")
 import("mojo.gni")
 import("mojo_sdk.gni")
 
 # Generate a binary mojo application.The parameters of this template are those
 # of a shared library.
 template("mojo_native_application") {
   if (defined(invoker.output_name)) {
     output = invoker.output_name + ".mojo"
     library_target_name = invoker.output_name + "_library"
   } else {
@@ skipping 62 matching lines @@
     if (defined(invoker.data_deps)) {
       data_deps = invoker.data_deps
       if (use_prebuilt_mojo_shell) {
         data_deps += [ copy_mojo_shell ]
       }
     } else {
       if (use_prebuilt_mojo_shell) {
         data_deps = [ copy_mojo_shell ]
       }
     }
+
+    if (use_prebuilt_network_service) {
+      copy_network_service =
+          rebase_path("mojo/public/tools:copy_network_service", ".", mojo_root)
+    }
+
+    # Copy the prebuilt network service if using it.

[ppi, 2015/02/10 16:49:50]

nit: tautology, maybe s/using it/needed/?

[blundell, 2015/02/11 21:06:17]

Done.

+    if (use_prebuilt_network_service) {
+      if (defined(data_deps)) {

[ppi, 2015/02/10 16:49:50]

nit: We already have a similar block above, maybe declare data_deps = [] and
then append unconditionally here and above?

[blundell, 2015/02/11 21:06:17]

Done.

+        data_deps += [ copy_network_service ]
+      } else {
+        data_deps = [ copy_network_service ]
+      }
+    }
+
     deps = rebase_path([
                          "mojo/public/c/system",
                          "mojo/public/platform/native:system",
                        ],
                        ".",
                        mojo_root)
     if (defined(invoker.deps)) {
       deps += invoker.deps
     }
     if (defined(invoker.forward_dependent_configs_from)) {
@@ skipping 110 matching lines @@
       rebase_input = rebase_path(input, root_build_dir)
       rebase_output = rebase_path(output, root_build_dir)
       args = [
         "--input=$rebase_input",
         "--output=$rebase_output",
         "--line=#!mojo mojo:android_handler",
       ]
     }
   }
 }