Create .mojo applications in a common subdir under out/Debug

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/toolchain/toolchain.gni")
+import("//mojo/public/mojo_constants.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
   import("//build/config/zip.gni")
 }
 
 # Generate a binary Mojo application in a self-named directory.
 # Application resources are copied to a "resources" directory alongside the app.
 # The parameters of this template are those of a shared library.
 template("mojo_native_application") {
   base_target_name = target_name
   if (defined(invoker.output_name)) {
     base_target_name = invoker.output_name
   }
 
   final_target_name = target_name
 
   mojo_deps = []
   if (defined(invoker.deps)) {
     mojo_deps += invoker.deps
   }
 
   mojo_data_deps = []
 
   if (defined(invoker.resources)) {
     copy_step_name = "${base_target_name}__copy_resources"
     copy(copy_step_name) {
       sources = invoker.resources
       outputs = [
-        "${root_out_dir}/${base_target_name}/resources/{{source_file_part}}",
+        "${root_out_dir}/${mojo_application_subdir}/${base_target_name}/resources/{{source_file_part}}",
       ]
       if (defined(invoker.testonly)) {
         testonly = invoker.testonly
       }
       deps = mojo_deps
     }
     mojo_data_deps += [ ":$copy_step_name" ]
   }
 
   output = base_target_name + ".mojo"
@@ skipping 88 matching lines @@
                              "visibility",
                            ])
     deps = [
       ":${library_target_name}",
     ]
 
     sources = [
       "${root_shlib_dir}/${library_name}",
     ]
     outputs = [
-      "${root_out_dir}/${base_target_name}/${output}",
+      "${root_out_dir}/${mojo_application_subdir}/${base_target_name}/${output}",
     ]
   }
 
   if (is_android) {
     android_assets("${final_target_name}_assets") {
       forward_variables_from(invoker, [ "testonly" ])
       deps = [
         ":${library_target_name}",
       ]
       if (defined(invoker.deps)) {
@@ skipping 30 matching lines @@
     if (defined(invoker.output_name)) {
       base_target_name = invoker.output_name
     }
 
     mojo_data_deps = []
     if (defined(invoker.resources)) {
       copy_step_name = "${base_target_name}__copy_resources"
       copy(copy_step_name) {
         sources = invoker.resources
         outputs = [
-          "${root_out_dir}/${base_target_name}/resources/{{source_file_part}}",
+          "${root_out_dir}/${mojo_application_subdir}/${base_target_name}/resources/{{source_file_part}}",
         ]
         if (defined(invoker.testonly)) {
           testonly = invoker.testonly
         }
         if (defined(invoker.deps)) {
           deps = invoker.deps
         }
       }
       mojo_data_deps += [ ":$copy_step_name" ]
     }
 
     zip_action_name = "${target_name}_zip"
     zip_action_output = "$target_gen_dir/${target_name}.zip"
     prepend_action_name = target_name
     zip(zip_action_name) {
       visibility = [ ":$prepend_action_name" ]
       inputs = [
         invoker.input_so,
         invoker.input_dex_jar,
       ]
       output = zip_action_output
       forward_variables_from(invoker,
                              [
                                "deps",
                                "public_deps",
                                "data_deps",
                              ])
     }
 
-    _mojo_output =
-        "${root_out_dir}/${base_target_name}/${base_target_name}.mojo"
+    _mojo_output = "${root_out_dir}/${mojo_application_subdir}/${base_target_name}/${base_target_name}.mojo"
 
     action(target_name) {
       script = "//mojo/public/tools/prepend.py"
 
       input = zip_action_output
       inputs = [
         input,
       ]
 
       outputs = [
@@ skipping 24 matching lines @@
       renaming_destinations = [ "${base_target_name}/${base_target_name}.mojo" ]
       if (defined(invoker.resources)) {
         renaming_sources += invoker.resources
         renaming_destinations += process_file_template(
                 invoker.resources,
                 [ "$base_target_name/resources/{{source_file_part}}" ])
       }
     }
   }
 }