Move iOS tests to XCTest from gtest.

webrtc/webrtc.gni

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/arm.gni")
 import("//build/config/features.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/build.gni")
 import("//testing/test.gni")
+if (is_ios) {
+  import("//build/config/ios/rules.gni")
+}
 
 declare_args() {
   # Disable this to avoid building the Opus audio codec.
   rtc_include_opus = true
 
   # Enable this if the Opus version upon which WebRTC is built supports direct
   # encoding of 120 ms packets.
   rtc_opus_support_120ms_ptime = false
 
   # Enable this to let the Opus audio codec change complexity on the fly.
@@ skipping 295 matching lines @@
                            ])
     configs += invoker.configs
     configs -= rtc_remove_configs
     configs -= invoker.suppressed_configs
     public_configs = [ rtc_common_inherited_config ]
     if (defined(invoker.public_configs)) {
       public_configs += invoker.public_configs
     }
   }
 }
+
+if (is_ios) {
+  set_defaults("rtc_ios_xctest_test") {
+    configs = rtc_add_configs
+    suppressed_configs = []
+  }
+
+  template("rtc_ios_xctest_test") {
+    ios_xctest_test(target_name) {
+      forward_variables_from(invoker,
+                             "*",
+                             [
+                               "configs",
+                               "public_configs",
+                               "suppressed_configs",
+                             ])
+      configs += invoker.configs
+      configs -= rtc_remove_configs
+      configs -= invoker.suppressed_configs
+      public_configs = [ rtc_common_inherited_config ]
+      if (defined(invoker.public_configs)) {
+        public_configs += invoker.public_configs
+      }
+    }
+  }
+}