Convert some GN test support targets to static libs.

cc/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
@@ skipping 571 matching lines @@
   if (enable_vulkan) {
     sources += [
       "output/vulkan_renderer.cc",
       "output/vulkan_renderer.h",
     ]
 
     deps += [ "//gpu/vulkan" ]
   }
 }
 
-source_set("test_support") {
+static_library("test_support") {
   testonly = true
   sources = [
     "test/animation_test_common.cc",
     "test/animation_test_common.h",
     "test/animation_timelines_test_common.cc",
     "test/animation_timelines_test_common.h",
     "test/begin_frame_args_test.cc",
     "test/begin_frame_args_test.h",
     "test/begin_frame_source_test.cc",
     "test/begin_frame_source_test.h",
@@ skipping 440 matching lines @@
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 
   # This target should not require the Chrome executable to run.
   assert_no_deps = [ "//chrome" ]
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the cc_unittests_run target in cc_tests.gyp.