[DevTools] Remove Browser domain, switch clients to Target.

headless/public/util/dom_tree_extractor_browsertest.cc

 // Copyright 2016 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 "headless/public/util/dom_tree_extractor.h"
 
 #include <memory>
 #include "base/json/json_writer.h"
 #include "base/strings/string_util.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test.h"
 #include "headless/lib/browser/headless_web_contents_impl.h"
-#include "headless/public/domains/browser.h"
 #include "headless/public/domains/emulation.h"
 #include "headless/public/domains/network.h"
 #include "headless/public/domains/page.h"
 #include "headless/public/headless_browser.h"
 #include "headless/public/headless_devtools_client.h"
 #include "headless/public/headless_devtools_target.h"
 #include "headless/test/headless_browser_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
@@ skipping 799 matching lines @@
 
     FinishAsynchronousTest();
   }
 
   std::unique_ptr<DomTreeExtractor> extractor_;
 };
 
 HEADLESS_ASYNC_DEVTOOLED_TEST_F(DomTreeExtractorBrowserTest);
 
 }  // namespace headless