Adding nacl component unit tests

components/nacl/browser/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/features.gni")
 
 assert(enable_nacl)
 
 source_set("browser") {
   sources = [
@@ skipping 57 matching lines @@
       # TODO(fdoray): Remove this once the PreRead field trial has expired.
       # crbug.com/577698
       "//components/startup_metric_utils/common",
     ]
   }
 
   if (is_win && current_cpu == "x86") {
     data_deps += [ "//components/nacl/broker:nacl64" ]
   }
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "nacl_file_host_unittest.cc",
+    "nacl_process_host_unittest.cc",
+    "nacl_validation_cache_unittest.cc",
+    "pnacl_host_unittest.cc",
+    "pnacl_translation_cache_unittest.cc",
+    "test_nacl_browser_delegate.cc",
+  ]
+
+  deps = [
+    ":browser",
+    "//base",
+    "//components/nacl/common",
+    "//content/test:test_support",
+    "//net:test_support",
+  ]
+
+  if (is_linux) {
+    sources += [ "../zygote/nacl_fork_delegate_linux_unittest.cc" ]
+  }
+}