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..efeecdd3d560943e7a39d24c16a89d7b19b832c3 100644
--- a/chrome/installer/mac/app/BUILD.gn
+++ b/chrome/installer/mac/app/BUILD.gn
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-executable("downloader") {
+static_library("mac_installer_base") {
   sources = [
     "DownloadDelegate.m",
     "Downloader.m",
@@ -11,7 +11,29 @@ executable("downloader") {
     "OmahaXMLParser.m",
     "OmahaXMLRequest.m",
     "SystemInfo.m",
+  ]
+}
+
+executable("mac_installer") {
+  sources = [
     "main.m",
   ]
+  deps = [
+    ":mac_installer_base",
+  ]
+  libs = [ "Foundation.framework" ]
+}
+
+executable("mac_installer_test") {

[Mark Mentovai, 2016/07/19 21:03:49]

OK! Got a better answer here.

This should use the test() target type instead of executable(). That should take
care of the gtest dependencies for you. You’ll find examples in .gn files
elsewhere in the codebase.

[Anna Zeng, 2016/07/22 16:58:02]

Done.

+  testonly = true
+  sources = [
+    #    "//testing/gtest/src/gtest_main.cc",
+    "testing/OmahaXMLRequest_test.mm",
+    "testing/SystemInfo_test.mm",
+  ]
+  deps = [
+    ":mac_installer_base",
+    "//testing/gtest:gtest_main",

[Mark Mentovai, 2016/07/19 21:03:49]

And the answer on this one is to use //base/test:run_all_unittests instead of
gtest_main. (You can also remove the commented-out line 30.)

[Anna Zeng, 2016/07/22 16:58:02]

Done.

+  ]
   libs = [ "Foundation.framework" ]
 }