Rewrite layout_browsertests to use content_shell --dump-render-tree to execute layout tests

content/test/content_browser_test.cc

 // Copyright (c) 2011 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/test/content_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 75 matching lines @@
   BrowserTestBase::SetUp();
 }
 
 void ContentBrowserTest::TearDown() {
   BrowserTestBase::TearDown();
 
   shell_main_delegate_.reset();
 }
 
 void ContentBrowserTest::RunTestOnMainThreadLoop() {
-  CHECK_EQ(Shell::windows().size(), 1u);
-  shell_ = Shell::windows()[0];
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree)) {
+    CHECK_EQ(Shell::windows().size(), 1u);
+    shell_ = Shell::windows()[0];
+  }
 
 #if defined(OS_MACOSX)
   // On Mac, without the following autorelease pool, code which is directly
   // executed (as opposed to executed inside a message loop) would autorelease
   // objects into a higher-level pool. This pool is not recycled in-sync with
   // the message loops' pools and causes problems with code relying on
   // deallocation via an autorelease pool (such as browser window closure and
   // browser shutdown). To avoid this, the following pool is recycled after each
   // time code is directly executed.
   base::mac::ScopedNSAutoreleasePool pool;
@@ skipping 37 matching lines @@
       static_cast<ShellContentBrowserClient*>(GetContentClient()->browser());
   return Shell::CreateNewWindow(
       browser_client->off_the_record_browser_context(),
       GURL(chrome::kAboutBlankURL),
       NULL,
       MSG_ROUTING_NONE,
       NULL);
 }
 
 }  // namespace content