Create test module for ios chrome ui EG2 tests.

This module does not have actual tests yet.

Notable changes:
 - add ios_chrome_ui_eg2tests_module module
 - add ios_chrome_ui_eg2tests_module to ios/chrome/test/earl_grey2:all_tests
   target

This CL follows the same pattern as https://crrev.com/c/1628171

Bug: 866147
Change-Id: Iaac2b480054e221e8b3b9b8a8b07292608e27742
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636483Reviewed-by: Mohammad Refaat <mrefaat@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664864}

ios/chrome/browser/ui/download/BUILD.gn

@@ -136,3 +136,23 @@ source_set("eg_tests") {
   ]
   libs = [ "XCTest.framework" ]
 }
+
+source_set("eg2_tests") {
+  defines = [ "CHROME_EARL_GREY_2" ]
+  configs += [
+    "//build/config/compiler:enable_arc",
+    "//build/config/ios:xctest_config",
+  ]
+  testonly = true
+
+  sources = []
+
+  deps = [
+    "//ios/chrome/test/earl_grey:eg_test_support+eg2",
+    "//ios/web/public/test:element_selector",
+    "//net:test_support",
+    "//ui/base",
+  ]
+
+  libs = [ "UIKit.framework" ]
+}

ios/chrome/test/earl_grey2/BUILD.gn

@@ -11,6 +11,7 @@ group("all_tests") {
   deps = [
     ":ios_chrome_eg2tests",
     ":ios_chrome_smoke_eg2tests_module",
+    ":ios_chrome_ui_eg2tests_module",
     ":ios_chrome_web_eg2tests_module",
   ]
 }
@@ -34,6 +35,14 @@ chrome_ios_eg2_test("ios_chrome_web_eg2tests_module") {
   ]
 }
 
+chrome_ios_eg2_test("ios_chrome_ui_eg2tests_module") {
+  xcode_test_application_name = "ios_chrome_eg2tests"
+
+  deps = [
+    "//ios/chrome/browser/ui/download:eg2_tests",
+  ]
+}
+
 source_set("shared_helper_headers") {
   testonly = true
   sources = [