Fix running unittests on iOS simulator

webrtc/base/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("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 712 matching lines @@
 
   if (!build_with_chromium && is_clang) {
     # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
     suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
   }
 }
 
 if (rtc_include_tests) {
   rtc_source_set("rtc_base_tests_main") {
     testonly = true
-    sources = [
-      "unittest_main.cc",
-    ]
+    sources = []
+    if (!is_ios) {
+      sources += [ "unittest_main.cc" ]
+    }
     public_configs = [ ":rtc_base_tests_utils_exported_config" ]
     deps = [
       ":rtc_base",
       ":rtc_base_approved",
       ":rtc_base_tests_utils",
       "../test:field_trial",
       "../test:test_support",
     ]
+
+    # TODO(oprypin): Bug 7758: integrate the iOS unittest support into WebRTC's
+    # unittest_main instead of replacing it with Chromium's main function.
+    if (is_ios) {
+      deps += [ "//base/test:run_all_unittests" ]
+    }
     public_deps = [
       "//testing/gmock",
       "//testing/gtest",
     ]
 
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
@@ skipping 225 matching lines @@
 if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/ContextUtils.java",
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
   }
 }