Add chrome driver to the GN build.

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 14 matching lines @@
 group("gyp_all") {
   testonly = true
 
   # TODO(GYP): This target should describe everything that is built by a GYP
   # build but not yet by a GN build, i.e., these are the targets that still
   # need to be ported to GN. Eventually this target should be identical to
   # gn_all.
 
   deps = [
     ":gn_all",
-    # "//chrome/test:chromedriver_unittests", # TODO(GYP)
     # "//components:components_browsertests", # TODO(GYP)
     # "//components/nacl:nacl_loader_unittests", # TODO(GYP)
     # "//google_apis:google_apis_unittests", # TODO(GYP)
     # "//ui/compositor:compositor_unittests", # TODO(GYP)
     # "//device:device_unittests", # TODO(GYP)
     # "//ppapi:ppapi_unittests", # TODO(GYP)
     # "//remoting:remoting_unittests",  # TODO(GYP)
   ]
 }
 
 # The "gn_all" target matches the "gn_all" target in build/all.gyp.
 # It is not (yet!) the same as building "all".
 # TODO(GYP): Make it be basically the same as building all, or at least
 # be sure that we don't want any of the stuff listed in gn_all to
 # be built by default.
 
 # In GN, a "group" is a dummy target that just lists other targets.
 group("gn_all") {
   testonly = true
 
   deps = [
     "//base:base_unittests",
     "//cc:cc_unittests",
     "//chrome",
     "//chrome/test:browser_tests",
     "//chrome/test:interactive_ui_tests",
     "//chrome/test:sync_integration_tests",
     "//chrome/test:unit_tests",
+    "//chrome/test/chromedriver:chromedriver_unittests",
     "//components:components_unittests",
     "//content/shell:content_shell",
     "//content/test:content_browsertests",
     "//content/test:content_perftests",
     "//content/test:content_unittests",
     "//crypto:crypto_unittests",
     "//extensions:extensions_browsertests",
     "//extensions:extensions_unittests",
     "//google_apis/gcm:gcm_unit_tests",
     "//gpu:gpu_unittests",
@@ skipping 225 matching lines @@
   }
 }
 
 if (is_linux) {
   # This group corresponds to the list of tests run on the waterfall for
   # desktop Linux GYP builds from testing/buildbot/chromium.linux.json. It's
   # here to help track GYP -> GN conversion progress.
   group("linux_default_tests") {
     testonly = true
     deps = [
-      # chromedriver_unittests  TODO(GYP)
       # components_browsertests  TODO(GYP)
       # device_unittests  TODO(GYP)
       # nacl_loader_unittests  TODO(GYP)
       # ppapi_unittests  TODO(GYP)
       # remoting_unittests  TODO(GYP)
 
       "//base:base_unittests",  # PASSES (*) 2/25/2015
       "//cc:cc_unittests",  # PASSES 2/25/2015
       "//chrome/test:browser_tests",
       "//chrome/test:interactive_ui_tests",
-      "//chrome/test:sync_integration_tests",  # TODO(GYP) multiple crashes.
+      "//chrome/test:sync_integration_tests",  # Crashes for brettw in GN and GYP.
       "//chrome/test:unit_tests",  # PASSES 2/25/2015
+      "//chrome/test/chromedriver:chromedriver_unittests",  # PASSES 2/25/2015
       "//components:components_unittests",  # TODO(GYP) multiple crashes.
       "//content/test:content_browsertests",
       "//content/test:content_unittests",  # PASSES 2/25/2015
       "//crypto:crypto_unittests",  # PASSES 2/25/2015
       "//dbus:dbus_unittests",  # PASSES 2/25/2015
       "//extensions:extensions_browsertests",  # PASSES 2/25/2015
       "//extensions:extensions_unittests",  # PASSES 2/25/2015
       "//extensions/shell:app_shell_unittests",  # PASSES 2/25/2015
       "//google_apis/gcm:gcm_unit_tests",  # PASSES 2/25/2015
       "//google_apis:google_apis_unittests",  # PASSES 2/25/2015
@@ skipping 26 matching lines @@
       "//ui/touch_selection:ui_touch_selection_unittests",  # PASSES 2/25/2015
       "//ui/views:views_unittests",  # PASSES (*) 2/25/2015
       "//ui/wm:wm_unittests",  # PASSES 2/25/2015
       "//url:url_unittests",  # PASSES 2/25/2015
 
       # Note:
       # (*) Fails but failures match GYP build at time of testing.
     ]
   }
 }