Make chrome and other targets compile on Mac GN

extensions/shell/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.
 
 import("//extensions/shell/app_shell.gni")
 
 # Technically, this directory should not depend on files from src/chrome, but
 # that's where the VERSION file is. This  should probably all be moved to
 # src/build.
 import("//chrome/version.gni")
@@ skipping 138 matching lines @@
       "//extensions:shell_and_test_pak",
     ]
 
     if (is_win) {
       configs += [ "//build/config/win:windowed" ]
       configs -= [ "//build/config/win:console" ]
       deps += [ "//base/allocator" ]
     }
 
     if (is_mac) {
-      # TODO(GYP): Mac bundling
+      # TODO(GYP) bug 546894: Fix GN and toolchains to handle spaces here.
+      #output_name = "App Shell"
+      # TODO(GYP): Mac bundling. See also content_shell which this is basically
+      # a copy-paste of.
+      deps += [ ":app_shell_framework" ]
+      # TODO(GYP): Mac app_shell_helper stuff.
     }
   }
 }
 
 # TODO(GYP): Delete this after we've converted everything to GN.
 # The _run targets exist only for compatibility w/ GYP.
 group("app_shell_unittests_run") {
   testonly = true
   deps = [
     ":app_shell_unittests",
@@ skipping 61 matching lines @@
 
   if (is_win) {
     deps += [ "//base/allocator" ]
   }
 }
 
 process_version("version_header") {
   template_file = "common/version.h.in"
   output = "$target_gen_dir/common/version.h"
 }
+
+if (is_mac) {
+  # TODO(GYP) this should be a bundle. Lots of other stuff in this target.
+  # Should be able to copy content shell framework (this is basically a
+  # copy-paste of that target).
+  shared_library("app_shell_framework") {
+    testonly = true
+    sources = [
+      "app/shell_main_mac.cc",
+      "app/shell_main_mac.h",
+    ]
+    deps = [
+      ":app_shell_lib",
+    ]
+  }
+}