Introduce the notion of a "layout test mode" instead of turning individual flags on and off

content/renderer/render_thread_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 335 matching lines @@
   // Register this object as the main thread.
   ChildProcess::current()->set_main_thread(this);
 
   // In single process the single process is all there is.
   suspend_webkit_shared_timer_ = true;
   notify_webkit_of_modal_loop_ = true;
   widget_count_ = 0;
   hidden_widget_count_ = 0;
   idle_notification_delay_in_ms_ = kInitialIdleHandlerDelayMs;
   idle_notifications_to_skip_ = 0;
-  should_send_focus_ipcs_ = true;
-  short_circuit_size_updates_ = false;
-  skip_error_pages_ = false;
+  layout_test_mode_ = false;
 
   appcache_dispatcher_.reset(new AppCacheDispatcher(Get()));
   dom_storage_dispatcher_.reset(new DomStorageDispatcher());
   main_thread_indexed_db_dispatcher_.reset(new IndexedDBDispatcher());
 
   media_stream_center_ = NULL;
 
   db_message_filter_ = new DBMessageFilter();
   AddFilter(db_message_filter_.get());
 
@@ skipping 961 matching lines @@
 
 void RenderThreadImpl::SetFlingCurveParameters(
     const std::vector<float>& new_touchpad,
     const std::vector<float>& new_touchscreen) {
   webkit_platform_support_->SetFlingCurveParameters(new_touchpad,
                                                     new_touchscreen);
 
 }
 
 }  // namespace content