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

ios/web/BUILD.gn

 # 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("//ios/build/config.gni")
 import("//ios/web/js_compile.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 
+group("all_tests") {
+  testonly = true
+  deps = [
+    ":ios_web_inttests",
+    ":ios_web_unittests",
+  ]
+}
+
 source_set("web_arc") {
   deps = [
     ":core",
     ":js_resources",
     ":resources",
     ":user_agent",
     "//base",
     "//components/url_formatter",
     "//ios/net",
     "//ios/third_party/blink:html_tokenizer",
@@ skipping 602 matching lines @@
 }
 
 grit("resources") {
   source = "ios_web_resources.grd"
   use_qualified_include = true
   outputs = [
     "grit/ios_web_resources.h",
     "ios_web_resources.pak",
   ]
 }