Add functionality to the install_static library to tokenize strings and compare versions.

chrome/install_static/BUILD.gn

Index: chrome/install_static/BUILD.gn
diff --git a/chrome/install_static/BUILD.gn b/chrome/install_static/BUILD.gn
index 14d875e0b33df4184e7ac06997ddf0d3ca7b91ae..6ce584dd6d538d13743b4c6df62cd23c963fe891 100644
--- a/chrome/install_static/BUILD.gn
+++ b/chrome/install_static/BUILD.gn
@@ -29,3 +29,20 @@ static_library("install_static_util") {
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }
+
+test("install_static_unittests") {
+  output_name = "install_static_unittests"
+  sources = [
+    "install_static_unittests.cc",

[grt (UTC plus 2), 2016/05/27 14:13:20]

this source is testing functionality in install_util.{cc,h}, so please name it
install_util_unittest.cc (also, singular "unittest" is much more prevalent than
plural "unittests").

[ananta, 2016/05/27 20:05:25]

Done.

+  ]
+  include_dirs = [ "$target_gen_dir" ]
+  deps = [
+    "//base",
+    "//base/test:run_all_unittests",
+    "//base/test:test_support",
+    "//chrome/install_static:install_static_util",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+ }
+