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

content/shell/renderer/shell_render_process_observer.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/shell/renderer/shell_render_process_observer.h"
 
 #include "base/command_line.h"
 #include "content/public/common/content_client.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
@@ skipping 23 matching lines @@
 }
 
 ShellRenderProcessObserver::ShellRenderProcessObserver()
     : main_test_runner_(NULL),
       test_delegate_(NULL) {
   CHECK(!g_instance);
   g_instance = this;
   RenderThread::Get()->AddObserver(this);
   if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree))
     return;
-  DisableAppCacheLogging();
-  EnableDevToolsFrontendTesting();
-  EnableShortCircuitSizeUpdates();
-  DoNotSendFocusEvents();
-  DisableNavigationErrorPages();
+  EnableRendererLayoutTestMode();
 }
 
 ShellRenderProcessObserver::~ShellRenderProcessObserver() {
   CHECK(g_instance == this);
   g_instance = NULL;
 }
 
 void ShellRenderProcessObserver::SetTestDelegate(WebTestDelegate* delegate) {
   test_interfaces_->setDelegate(delegate);
   test_delegate_ = delegate;
@@ skipping 35 matching lines @@
   webkit_source_dir_ = webkit_source_dir;
 }
 
 void ShellRenderProcessObserver::OnLoadHyphenDictionary(
     const IPC::PlatformFileForTransit& dict_file) {
   ShellContentRendererClient::Get()->LoadHyphenDictionary(
       IPC::PlatformFileForTransitToPlatformFile(dict_file));
 }
 
 }  // namespace content