Convert ios_web_shell_test to GN.

ios/third_party/earl_grey/eg_test.gni

+# Copyright 2016 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/rules.gni")
+
+# For Chrome on iOS we want to run EarlGrey tests (that are XCTests) for all
+# our build configurations (Debug, Release, ...). In addition, the symbols
+# visibility is configured to private by default. To simplify testing with
+# those constraints, our tests are compiled in the TEST_HOST target instead
+# of the .xctest bundle.
+template("ios_eg_test") {
+  _target_name = target_name
+  _output_name = target_name
+  if (defined(invoker.output_name)) {
+    _output_name = invoker.output_name
+  }
+
+  _xctest_target = _target_name
+  _xctest_output = _output_name
+  _xctest_bundle = _xctest_target + "_bundle"
+  _xctest_config = _xctest_target + "_config"
+
+  config(_xctest_config) {
+    common_flags = [
+      "-F",
+      "$ios_sdk_platform_path/Developer/Library/Frameworks",
+    ]
+
+    cflags = common_flags
+    ldflags = common_flags
+
+    libs = [
+      "Foundation.framework",
+      "XCTest.framework",
+    ]
+  }
+
+  _xctest_info_plist_target = _xctest_target + "_info_plist"
+  _xctest_info_plist_bundle = _xctest_target + "_info_plist_bundle"
+  ios_info_plist(_xctest_info_plist_target) {
+    visibility = [ ":$_xctest_info_plist_bundle" ]
+    info_plist = "//ios/third_party/earl_grey/Module-Info.plist"
+    executable_name = _output_name
+  }
+
+  bundle_data(_xctest_info_plist_bundle) {
+    visibility = [ ":$_xctest_target" ]
+    public_deps = [
+      ":$_xctest_info_plist_target",
+    ]
+    sources = get_target_outputs(":$_xctest_info_plist_target")
+    outputs = [
+      "{{bundle_root_dir}}/Info.plist",
+    ]
+  }
+
+  _xctest_loadable_module_target = _xctest_target + "_loadable_module"
+  _xctest_loadable_module_bundle = _xctest_target + "_loadable_module_bundle"
+  loadable_module(_xctest_loadable_module_target) {
+    visibility = [ ":$_xctest_loadable_module_bundle" ]
+    sources = [
+      "//ios/third_party/earl_grey/xctest_shell.mm",
+    ]
+    configs += [ ":$_xctest_config" ]
+
+    output_name = rebase_path("$target_out_dir/$_xctest_output", root_out_dir)
+    output_prefix_override = true
+    output_extension = ""
+  }
+
+  bundle_data(_xctest_loadable_module_bundle) {
+    visibility = [ ":$_xctest_target" ]
+    public_deps = [
+      ":$_xctest_loadable_module_target",
+    ]
+    sources = [
+      "$target_out_dir/$_xctest_output",
+    ]
+    outputs = [
+      "{{bundle_root_dir}}/$_xctest_output",
+    ]
+  }
+
+  create_bundle(_xctest_target) {
+    visibility = [ ":$_xctest_bundle" ]
+    product_type = "com.apple.product-type.bundle.unit-test"
+    deps = [
+      ":$_xctest_info_plist_bundle",
+      ":$_xctest_loadable_module_bundle",
+    ]
+    bundle_root_dir = "$root_out_dir/$_xctest_output.xctest"
+  }
+
+  _host_target = _target_name + "_host"
+  _host_output = _output_name + "_host"
+
+  bundle_data(_xctest_bundle) {
+    visibility = [ ":$_host_target" ]
+    public_deps = [
+      ":$_xctest_target",
+    ]
+    sources = [
+      "$root_out_dir/$_xctest_output.xctest",
+    ]
+    outputs = [
+      "{{bundle_plugins_dir}}/$_xctest_output.xctest",
+    ]
+  }
+
+  ios_app_bundle(_host_target) {
+    forward_variables_from(invoker, "*", [ "testonly" ])
+
+    testonly = true
+    output_name = _host_output
+    info_plist = "//ios/third_party/earl_grey/Host-Info.plist"
+    configs += [ ":$_xctest_config" ]
+
+    if (!defined(bundle_deps)) {
+      bundle_deps = []
+    }
+    bundle_deps += [
+      ":$_xctest_bundle",
+      "//ios/third_party/earl_grey:xctest_bundle",
+      "//ios/third_party/earl_grey:earl_grey+bundle",
+      "//ios/third_party/ochamcrest:ochamcrest+bundle",
+    ]
+
+    if (!defined(ldflags)) {
+      ldflags = []
+    }
+    ldflags += [
+      "-Xlinker",
+      "-rpath",
+      "-Xlinker",
+      "@executable_path/Frameworks",
+      "-Xlinker",
+      "-rpath",
+      "-Xlinker",
+      "@loader_path/Frameworks",
+    ]
+  }
+}
+
+set_defaults("ios_eg_test") {
+  configs = default_executable_configs
+}