Move layout-test-specific switches from shell_switches to layout_test_switches.h

content/shell/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/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//build/config/win/console_app.gni")
 import("//build/config/win/manifest.gni")
 import("//media/media_options.gni")
@@ skipping 127 matching lines @@
     "browser/shell_speech_recognition_manager_delegate.h",
     "browser/shell_url_request_context_getter.cc",
     "browser/shell_url_request_context_getter.h",
     "browser/shell_web_contents_view_delegate.h",
     "browser/shell_web_contents_view_delegate_android.cc",
     "browser/shell_web_contents_view_delegate_creator.h",
     "browser/shell_web_contents_view_delegate_mac.mm",
     "browser/shell_web_contents_view_delegate_win.cc",
     "common/layout_test/layout_test_messages.cc",
     "common/layout_test/layout_test_messages.h",
+    "common/layout_test/layout_test_switches.cc",
+    "common/layout_test/layout_test_switches.h",
     "common/leak_detection_result.h",
     "common/shell_content_client.cc",
     "common/shell_content_client.h",
     "common/shell_messages.cc",
     "common/shell_messages.h",
     "common/shell_switches.cc",
     "common/shell_switches.h",
     "common/shell_test_configuration.cc",
     "common/shell_test_configuration.h",
     "renderer/layout_test/blink_test_helpers.cc",
@@ skipping 345 matching lines @@
     sources = [
       "app/shell_content_main.cc",
       "app/shell_content_main.h",
     ]
 
     deps = [
       ":content_shell_lib",
     ]
   }
 }