Converts most of WorkspaceLayoutManager tests to use common code

ash/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")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 1007 matching lines @@
   testonly = true
   sources = [
     "test/ash_test_impl_aura.cc",
     "test/ash_test_impl_aura.h",
   ]
   deps = [
     ":ash",
     ":test_support_common",
     "//base",
     "//skia",
+    "//ui/aura:test_support",
     "//ui/display",
+    "//ui/wm",
   ]
 }
 
 # Internal target consumed by |test_support_with_content| and
 # |test_support_without_content|. This target contains all the test support
 # files, with the exception of an implementation of AshTestEnvironment.
 # Consumers of ash should use one of |test_support_with_content| or
 # |test_support_without_content|.
 static_library("test_support_common") {
   testonly = true
@@ skipping 647 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }