[content shell] only instantiate webkit test runners for layout tests

content/shell/shell_content_renderer_client.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/shell_content_renderer_client.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
@@ skipping 40 matching lines @@
 }
 
 ShellContentRendererClient::~ShellContentRendererClient() {
 }
 
 void ShellContentRendererClient::RenderThreadStarted() {
   shell_observer_.reset(new ShellRenderProcessObserver());
 }
 
 void ShellContentRendererClient::RenderViewCreated(RenderView* render_view) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree))
+    return;
   WebKitTestRunner* test_runner = new WebKitTestRunner(render_view);
   if (!ShellRenderProcessObserver::GetInstance()->test_delegate()) {
     ShellRenderProcessObserver::GetInstance()->SetMainWindow(render_view,
                                                              test_runner,
                                                              test_runner);
   }
 }
 
 bool ShellContentRendererClient::OverrideCreatePlugin(
     RenderView* render_view,
@@ skipping 38 matching lines @@
     return true;
   }
   if (render_process_observer->test_delegate()) {
     *new_url = render_process_observer->test_delegate()->rewriteLayoutTestsURL(
         url.spec());
   }
   return true;
 }
 
 }  // namespace content