Added unpacking step

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 c5545e8510a96e542518cb51db0ac4672874fc07..8ba533dd5b51edfebb62f6a946965a7bd761179c 100644
--- a/chrome/installer/mac/app/BUILD.gn
+++ b/chrome/installer/mac/app/BUILD.gn
@@ -13,6 +13,7 @@ static_library("mac_installer_base") {
     "OmahaXMLParser.m",
     "OmahaXMLRequest.m",
     "SystemInfo.m",
+    "Unpacker.m",
   ]
 }
 
@@ -23,13 +24,17 @@ executable("mac_installer") {
   deps = [
     ":mac_installer_base",
   ]
-  libs = [ "Foundation.framework" ]
+  libs = [
+    "Cocoa.framework",
+    "DiskArbitration.framework",
+  ]
 }
 
 test("mac_installer_test") {
   sources = [
     "testing/OmahaXMLRequest_test.mm",
     "testing/SystemInfo_test.mm",
+    "testing/Unpacker_test.mm",
   ]
   deps = [
     ":mac_installer_base",
@@ -37,5 +42,8 @@ test("mac_installer_test") {
     "//base/test:run_all_unittests",
     "//testing/gtest:gtest",
   ]
-  libs = [ "Foundation.framework" ]
+  libs = [
+    "Cocoa.framework",
+    "DiskArbitration.framework",
+  ]
 }