Cleanup test_support target names.

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.
 
 component("cc") {
   sources = [
     "animation/animation.cc",
     "animation/animation.h",
     "animation/animation_curve.cc",
     "animation/animation_curve.h",
@@ skipping 619 matching lines @@
     "//gpu/command_buffer/client:gles2_implementation",
     "//gpu/command_buffer/client:gl_in_process_context",
     "//gpu/skia_bindings",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     # TODO(GYP)
     #"//third_party/mesa/mesa.gyp:osmesa",
     "//ui/gfx",
     "//ui/gfx/geometry",
-    "//ui/gfx:gfx_test_support",
+    "//ui/gfx:test_support",
     "//ui/gl",
   ]
 }
 
 # TODO(GYP) make these tests link when all deps are resolved.
 if (false) {
 
 test("cc_unittests") {
   sources = [
     "animation/animation_unittest.cc",
@@ skipping 131 matching lines @@
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }
 
 test("cc_perftests") {
   # TODO(GYP)
 }
 
 }  # if false