Cleanup: Remove unneeded browser_thread.h includes in contents.

content/browser/renderer_host/render_view_host_browsertest.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 "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/test/browser_test_utils.h"
-#include "content/public/test/test_browser_thread.h"
 #include "content/shell/shell.h"
 #include "content/test/content_browser_test.h"
 #include "content/test/content_browser_test_utils.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_util.h"
 #include "net/test/test_server.h"
 
 namespace content {
 
 class RenderViewHostTest : public ContentBrowserTest {
@@ skipping 200 matching lines @@
   EXPECT_EQ(1, observer.navigation_count());
 
   // But should be set to the original page when reading MHTML.
   test_url = net::FilePathToFileURL(test_server()->document_root().Append(
       FILE_PATH_LITERAL("google.mht")));
   NavigateToURL(shell(), test_url);
   EXPECT_EQ("http://www.google.com/", observer.base_url().spec());
 }
 
 }  // namespace content