Adding components to dependencies on iOS.

components/metrics/BUILD.gn

 # Copyright 2014 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.
 
 # GYP version: components/metrics.gypi:metrics
 source_set("metrics") {
   sources = [
     "call_stack_profile_metrics_provider.cc",
     "call_stack_profile_metrics_provider.h",
     "clean_exit_beacon.cc",
@@ skipping 186 matching lines @@
   deps = [
     ":metrics",
     ":net",
     ":test_support",
     "//base:prefs_test_support",
     "//base/test:test_support",
     "//components/variations",
     "//testing/gtest",
   ]
 
+  if (!is_ios) {
+    deps += [
+      "//content/public/common",
+      ":gpu",
+      ":profiler",
+    ]
+    sources += [
+      "gpu/gpu_metrics_provider_unittest.cc",
+      "profiler/profiler_metrics_provider_unittest.cc",
+      "profiler/tracking_synchronizer_unittest.cc",
+    ]
+  }
   if (is_linux) {
     sources += [ "serialization/serialization_utils_unittest.cc" ]
     deps += [ ":serialization" ]
   }
 
   if (!is_ios) {
     sources += [
       "gpu/gpu_metrics_provider_unittest.cc",
       "profiler/profiler_metrics_provider_unittest.cc",
       "profiler/tracking_synchronizer_unittest.cc",
     ]
     deps += [
       ":gpu",
       ":profiler",
       "//content/public/common",
     ]
   }
 }
 # TODO(GYP): metrics_chromeos