Convert some GN test support targets to static libs.

ui/views/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("views.gyp") ],
@@ skipping 130 matching lines @@
     ]
     libs = [
       "AppKit.framework",
       "CoreGraphics.framework",
       "Foundation.framework",
       "QuartzCore.framework",  # Required by bridged_native_widget.mm.
     ]
   }
 }
 
-source_set("test_support_internal") {
+static_library("test_support_internal") {
   testonly = true
   sources = gypi_values.views_test_support_sources
 
   # External code should depend upon "test_support".
   visibility = [ "./*" ]
 
   configs += [ "//build/config:precompiled_headers" ]
 
   public_deps = [
     ":views",
@@ skipping 163 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }