Upstream Chrome on iOS source code [11/11].

ios/chrome/test/base/BUILD.gn

 # Copyright 2016 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.
 
 source_set("base") {
   testonly = true
   sources = [
     "scoped_block_swizzler.h",
     "scoped_block_swizzler.mm",
   ]
   deps = [
     "//base",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "scoped_block_swizzler_unittest.mm",
   ]
   deps = [
     ":base",
     "//base",
     "//testing/gtest",
   ]
 }
+
+source_set("perf_test_support") {
+  testonly = true
+  sources = [
+    "perf_test_ios.h",
+    "perf_test_ios.mm",
+  ]
+  deps = [
+    "//base",
+    "//ios/chrome/browser/web:web_internal",
+    "//ios/chrome/test:test_support",
+    "//ios/web:test_support",
+  ]
+}