[iOS/GN] Fix the compilation of "all" on iOS with gn.

services/shell/public/cpp/BUILD.gn

 # 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_base
 source_set("cpp") {
   public_deps = [
     ":sources",
   ]
 }
@@ skipping 32 matching lines @@
 
   public_deps = [
     "//base",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
     "//services/shell/public/interfaces",
     "//url",
   ]
 }
 
-source_set("application_support") {
-  sources = [
-    "lib/init_commandline.cc",
-    "lib/initialize_base_and_icu.cc",
-  ]
+if (!is_ios) {
+  source_set("application_support") {
+    sources = [
+      "lib/init_commandline.cc",
+      "lib/initialize_base_and_icu.cc",
+    ]
 
-  deps = [
-    "//base",
-    "//base:i18n",
-    "//mojo/public/c/system",
-  ]
+    deps = [
+      "//base",
+      "//base:i18n",
+      "//mojo/public/c/system",
+    ]
+  }
+
+  source_set("shell_test_support") {
+    testonly = true
+    sources = [
+      "lib/shell_test.cc",
+      "shell_test.h",
+    ]
+
+    public_deps = [
+      ":cpp",
+      "//testing/gtest",
+    ]
+
+    deps = [
+      "//base",
+      "//base/test:test_support",
+      "//mojo/logging",
+      "//mojo/public/cpp/bindings",
+      "//mojo/public/cpp/system",
+      "//services/shell/background:lib",
+      "//services/shell/public/interfaces:interfaces_cpp_sources",
+    ]
+
+    data_deps = []
+  }
 }
-
-source_set("shell_test_support") {
-  testonly = true
-  sources = [
-    "lib/shell_test.cc",
-    "shell_test.h",
-  ]
-
-  public_deps = [
-    ":cpp",
-    "//testing/gtest",
-  ]
-
-  deps = [
-    "//base",
-    "//base/test:test_support",
-    "//mojo/logging",
-    "//mojo/public/cpp/bindings",
-    "//mojo/public/cpp/system",
-    "//services/shell/background:lib",
-    "//services/shell/public/interfaces:interfaces_cpp_sources",
-  ]
-
-  data_deps = []
-}