Handle storyboards in GN.

build/config/ios/rules.gni

 # Copyright 2015 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/config/ios/ios_sdk.gni")
 import("//build/config/mac/base_rules.gni")
 import("//build/config/mac/symbols.gni")
 import("//build/toolchain/toolchain.gni")
 
 # Invokes lipo on multiple arch-specific binaries to create a fat binary.
@@ skipping 731 matching lines @@
 
 # Compile a xib or storyboard file and add it to a bundle_data so that it is
 # available at runtime in the bundle.
 #
 # Arguments
 #
 #   source:
 #       string, path of the xib or storyboard to compile.
 #
 # Forwards all variables to the bundle_data target.
-template("bundle_data_xib") {
+template("bundle_data_ib_file") {

[sdefresne, 2016/12/09 15:29:55]

Don't remove the old template name, you'll break downstream. You can rename it,
but keep a forwarding-template until all downstream code has been ported to the
new name:

template("bundle_data_xib") {
  bundle_data_ib_file(target_name) {
    forward_variables_from(invoker, "*")
  }
}

   assert(defined(invoker.source), "source needs to be defined for $target_name")
 
   _source_extension = get_path_info(invoker.source, "extension")
   assert(_source_extension == "xib" || _source_extension == "storyboard",
          "source must be a .xib or .storyboard for $target_name")
 
   _target_name = target_name
-  _compile_xib = target_name + "_compile_xib"
+  if (_source_extension == "xib") {
+    _compile_ib_file = target_name + "_compile_xib"
+    _compile_ib_file_template = "compile_xibs"
+  } else {
+    _compile_ib_file = target_name + "_compile_storyboard"
+    _compile_ib_file_template = "compile_storyboards"
+  }
 
-  compile_xibs(_compile_xib) {
+  target(_compile_ib_file_template, _compile_ib_file) {
     sources = [
       invoker.source,
     ]
     visibility = [ ":$_target_name" ]
     ibtool_flags = [
       "--minimum-deployment-target",
       ios_deployment_target,
       "--auto-activate-custom-fonts",
       "--target-device",
       "iphone",
       "--target-device",
       "ipad",
     ]
   }
 
   bundle_data(_target_name) {
     forward_variables_from(invoker, "*", [ "source" ])
 
     if (!defined(public_deps)) {
       public_deps = []
     }
-    public_deps += [ ":$_compile_xib" ]
+    public_deps += [ ":$_compile_ib_file" ]
 
-    sources = get_target_outputs(":$_compile_xib")
+    sources = get_target_outputs(":$_compile_ib_file")
 
     outputs = [
       "{{bundle_resources_dir}}/{{source_file_part}}",
     ]
   }
 }
 
 # Compile a strings file and add it to a bundle_data so that it is available
 # at runtime in the bundle.
 #
@@ skipping 616 matching lines @@
       "-rpath",
       "-Xlinker",
       "@loader_path/Frameworks",
     ]
   }
 }
 
 set_defaults("ios_xctest_test") {
   configs = default_executable_configs
 }