Remove duplicate application cpp files in mojo/application.

mojo/application/BUILD.gn

Index: mojo/application/BUILD.gn
diff --git a/mojo/application/BUILD.gn b/mojo/application/BUILD.gn
deleted file mode 100644
index 5f3f0e57214e85d46a489bfbe2905a2eeae1f9f1..0000000000000000000000000000000000000000
--- a/mojo/application/BUILD.gn
+++ /dev/null
@@ -1,64 +0,0 @@
-# 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.
-
-# GYP version: mojo/mojo_base.gyp:mojo_application_chromium
-source_set("application") {
-  sources = [
-    "app_lifetime_helper.cc",
-    "app_lifetime_helper.h",
-    "application_runner_chromium.cc",
-    "application_runner_chromium.h",
-  ]
-
-  public_deps = [
-    "//mojo/application/public/cpp",
-  ]
-  deps = [
-    "//base",
-    "//mojo/common",
-    "//mojo/environment:chromium",
-  ]
-}
-
-source_set("content_handler") {
-  sources = [
-    "content_handler_factory.cc",
-    "content_handler_factory.h",
-  ]
-  deps = [
-    ":application",
-    "//base",
-    "//mojo/application/public/interfaces",
-    "//mojo/common",
-    "//mojo/environment:chromium",
-    "//mojo/services/network/public/interfaces",
-  ]
-}
-
-source_set("test_support") {
-  testonly = true
-  sources = [
-    "application_test_base_chromium.cc",
-    "application_test_base_chromium.h",
-    "application_test_main_chromium.cc",
-  ]
-
-  deps = [
-    "//base",
-    "//base/test:test_support",
-    "//mojo/application/public/cpp",
-    "//third_party/mojo/src/mojo/public/cpp/bindings",
-    "//third_party/mojo/src/mojo/public/cpp/environment",
-    "//third_party/mojo/src/mojo/public/cpp/system",
-    "//testing/gtest",
-  ]
-
-  data_deps = []
-  if (is_android) {
-    data_deps += [ "//mojo/android" ]
-  }
-  if (!is_component_build) {
-    data_deps += [ "//mojo/runner" ]
-  }
-}