Get mojo_shell building inside chromium checkout.

third_party/mojo/src/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.
@@ skipping 59 matching lines @@
       if (defined(invoker.libs)) {
         libs = invoker.libs
       }
 
       data_deps = []
       if (defined(invoker.data_deps)) {
         data_deps = invoker.data_deps
       }
 
       # Copy any necessary prebuilt artifacts.
-      if (mojo_use_prebuilt_mojo_shell) {
-        data_deps +=
-            [ rebase_path("mojo/public/tools:copy_mojo_shell", ".", mojo_root) ]
-      }
       if (mojo_use_prebuilt_network_service) {
         data_deps += [ rebase_path("mojo/public/tools:copy_network_service",
                                    ".",
                                    mojo_root) ]
       }
 
       deps = rebase_path([
                            "mojo/public/c/system",
                            "mojo/public/platform/native:system",
                          ],
@@ skipping 96 matching lines @@
       if (defined(invoker.libs)) {
         libs = invoker.libs
       }
 
       data_deps = []
       if (defined(invoker.data_deps)) {
         data_deps = invoker.data_deps
       }
 
       # Copy any necessary prebuilt artifacts.
-      if (mojo_use_prebuilt_mojo_shell) {
-        data_deps +=
-            [ rebase_path("mojo/public/tools:copy_mojo_shell", ".", mojo_root) ]
-      }
       if (mojo_use_prebuilt_network_service) {
         data_deps += [ rebase_path("mojo/public/tools:copy_network_service",
                                    ".",
                                    mojo_root) ]
       }
 
       deps = rebase_path([
                            "mojo/public/c/system",
                            "mojo/public/platform/nacl:system",
                          ],
@@ skipping 131 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",
       ]
     }
   }
 }