Fix running unittests on iOS simulator

webrtc/test/BUILD.gn

 # 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("../webrtc.gni")
 import("//build/config/ui.gni")
@@ skipping 144 matching lines @@
 }
 
 if (!build_with_chromium) {
   # This target depends on //third_party/gflags and since chromium does not
   # have gflags it causes an error when Gn parses this BUILD.gn file.
   # It seems that Gn eagerly tries to understand if all the targets are
   # buildable (even deps). Obviously gflags is not buildable in chromium
   # so if a target depends on this BUILD.gn file we hit this error.
   rtc_source_set("test_main") {
     testonly = true
-    sources = [
-      "test_main.cc",
-    ]
+    sources = []
+    if (!is_ios) {
+      sources += [ "test_main.cc" ]
+    }
 
     public_deps = [
       ":test_support",
     ]
     deps = [
       ":field_trial",
       "../base:rtc_base_approved",
       "../system_wrappers:metrics_default",
       "//testing/gmock",
       "//testing/gtest",
       "//third_party/gflags",
     ]
+
+    # TODO(oprypin): Bug 7758: integrate the iOS unittest support into WebRTC's
+    # test_main instead of replacing it with Chromium's main function.
+    if (is_ios) {
+      deps += [ "//base/test:run_all_unittests" ]
+    }
   }
 
   rtc_source_set("video_test_support") {
     testonly = true
 
     sources = [
       "testsupport/frame_reader.h",
       "testsupport/frame_writer.h",
       "testsupport/metrics/video_metrics.cc",
       "testsupport/metrics/video_metrics.h",
@@ skipping 405 matching lines @@
     java_files = [
       "android/org/webrtc/native_test/RTCNativeUnitTest.java",
       "android/org/webrtc/native_test/RTCNativeUnitTestActivity.java",
     ]
     deps = [
       "//testing/android/native_test:native_test_java",
       "//webrtc/base:base_java",
     ]
   }
 }