Refactor //ios:all target in preparation of upstreaming.

ios/chrome/test/BUILD.gn

Index: ios/chrome/test/BUILD.gn
diff --git a/ios/chrome/test/BUILD.gn b/ios/chrome/test/BUILD.gn
index 7d1401008ab7f91bdf42a1807160b5c4858cd174..319b88cfbeec47e02d68123c544ca170b855eb49 100644
--- a/ios/chrome/test/BUILD.gn
+++ b/ios/chrome/test/BUILD.gn
@@ -2,6 +2,17 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//ios/build/config.gni")
+import("//ios/public/provider/chrome/browser/build_config.gni")
+import("//testing/test.gni")
+
+group("all_tests") {
+  testonly = true
+  deps = [
+    ":ios_chrome_unittests",
+  ]
+}
+
 source_set("test_support") {
   testonly = true
   sources = [
@@ -62,3 +73,51 @@ source_set("unit_tests") {
     "//third_party/google_toolbox_for_mac",
   ]
 }
+
+test("ios_chrome_unittests") {
+  deps = [
+    # Ensure that all unit tests are run and packed resources available.
+    ":run_all_unittests",
+    ios_packed_resources_target,
+
+    # Add unit_tests target here.
+    ":unit_tests",
+    "//ios/chrome/app:unit_tests",
+    "//ios/chrome/app/application_delegate:unit_tests",
+    "//ios/chrome/browser:unit_tests",
+    "//ios/chrome/browser/browsing_data:unit_tests",
+    "//ios/chrome/browser/device_sharing:unit_tests",
+    "//ios/chrome/browser/favicon:unit_tests",
+    "//ios/chrome/browser/geolocation:unit_tests",
+    "//ios/chrome/browser/itunes_links:unit_tests",
+    "//ios/chrome/browser/metrics:unit_tests",
+    "//ios/chrome/browser/native_app_launcher:unit_tests",
+    "//ios/chrome/browser/net:unit_tests",
+    "//ios/chrome/browser/passwords:unit_tests",
+    "//ios/chrome/browser/reading_list:unit_tests",
+    "//ios/chrome/browser/signin:unit_tests",
+    "//ios/chrome/browser/snapshots:unit_tests",
+    "//ios/chrome/browser/ssl:unit_tests",
+    "//ios/chrome/browser/suggestions:unit_tests",
+    "//ios/chrome/browser/sync:unit_tests",
+    "//ios/chrome/browser/translate:unit_tests",
+    "//ios/chrome/browser/u2f:unit_tests",
+    "//ios/chrome/browser/ui:unit_tests",
+    "//ios/chrome/browser/ui/alert_coordinator:unit_tests",
+    "//ios/chrome/browser/ui/commands:unit_tests",
+    "//ios/chrome/browser/ui/context_menu:unit_tests",
+    "//ios/chrome/browser/ui/dialogs:unit_tests",
+    "//ios/chrome/browser/ui/elements:unit_tests",
+    "//ios/chrome/browser/ui/keyboard:unit_tests",
+    "//ios/chrome/browser/ui/voice:unit_tests",
+    "//ios/chrome/browser/update_client:unit_tests",
+    "//ios/chrome/browser/voice:unit_tests",
+    "//ios/chrome/browser/web:unit_tests",
+    "//ios/chrome/browser/web_resource:unit_tests",
+    "//ios/chrome/common:unit_tests",
+    "//ios/chrome/test/base:unit_tests",
+    "//ios/web/public/image_fetcher:unit_tests",
+  ]
+
+  assert_no_deps = ios_assert_no_deps
+}