Added test files for SystemInfo.m and OmahaXMLRequest.m.

chrome/installer/mac/app/BUILD.gn

Index: chrome/installer/mac/app/BUILD.gn
diff --git a/chrome/installer/mac/app/BUILD.gn b/chrome/installer/mac/app/BUILD.gn
index aa2123f2c6ce5a2b5d1ae8e5cdcae118c36435af..47c6f1631a7ce0e400bd5bf471c5eeb610a2d09e 100644
--- a/chrome/installer/mac/app/BUILD.gn
+++ b/chrome/installer/mac/app/BUILD.gn
@@ -2,7 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-executable("downloader") {
+import("//testing/test.gni")
+
+static_library("mac_installer_base") {
   sources = [
     "DownloadDelegate.m",
     "Downloader.m",
@@ -11,7 +13,28 @@ executable("downloader") {
     "OmahaXMLParser.m",
     "OmahaXMLRequest.m",
     "SystemInfo.m",
+  ]
+}
+
+executable("mac_installer") {
+  sources = [
     "main.m",
   ]
+  deps = [
+    ":mac_installer_base",
+  ]
+  libs = [ "Foundation.framework" ]
+}
+
+test("mac_installer_test") {
+  testonly = true
+  sources = [
+    "testing/OmahaXMLRequest_test.mm",
+    "testing/SystemInfo_test.mm",
+  ]
+  deps = [
+    ":mac_installer_base",
+    "//base/test:run_all_unittests",
+  ]
   libs = [ "Foundation.framework" ]
 }