Mac/iOS/GN: Generate Info.plist files for Mac apps and frameworks with gn.

build/config/mac/mac_sdk.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/config/chrome_build.gni")
 
 # See https://bugs.chromium.org/p/webrtc/issues/detail?id=5453.
 # We can drop the rtc_require_mac_10_7_deployment flag when Chromium
 # also requires a 10.7 deployment target.
 import("//build_overrides/build.gni")
 
 declare_args() {
   # Minimum supported version of the Mac SDK.
   mac_sdk_min = mac_sdk_min_build_override
 
   # Minimum supported version of OSX.
   mac_deployment_target = mac_deployment_target_build_override
 
   # Path to a specific version of the Mac SDK, not including a backslash at
   # the end. If empty, the path to the lowest version greater than or equal to
   # mac_sdk_min is used.
   mac_sdk_path = ""
+
+  # The SDK name as accepted by xcodebuild.
+  mac_sdk_name = "macosx"
 }
 
 find_sdk_args = [ "--print_sdk_path" ]
 if (is_chrome_branded && is_official_build) {
   find_sdk_args += [
     "--verify",
     mac_sdk_min,
     "--sdk_path=" + mac_sdk_path,
   ]
 } else {
   find_sdk_args += [ mac_sdk_min ]
 }
 
 # The tool will print the SDK path on the first line, and the version on the
 # second line.
 find_sdk_lines =
     exec_script("//build/mac/find_sdk.py", find_sdk_args, "list lines")
 mac_sdk_version = find_sdk_lines[1]
 if (mac_sdk_path == "") {
   mac_sdk_path = find_sdk_lines[0]
 }
+
+script_name = "//build/config/mac/sdk_info.py"
+_mac_sdk_result = exec_script(script_name, [ mac_sdk_name ], "scope")
+mac_sdk_build = _mac_sdk_result.sdk_build
+xcode_version = _mac_sdk_result.xcode_version
+xcode_build = _mac_sdk_result.xcode_build
+machine_os_build = _mac_sdk_result.machine_os_build