remove unnecessary Shell::Initialize causing DCHECK on gpu_win bots

content/browser/gpu/gpu_functional_browsertest.cc

 // Copyright (c) 2013 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/command_line.h"
 #include "base/path_service.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/common/content_switches.h"
@@ skipping 52 matching lines @@
       javascript.append("\");");
       std::string result;
       EXPECT_TRUE(ExecuteScriptAndExtractString(shell()->web_contents(),
                                                 javascript,
                                                 &result));
       EXPECT_EQ(result, "success");
     }
   }
 
   void VerifyGPUProcessOnPage(std::string filename, bool wait) {
-    Shell::Initialize();
     ASSERT_TRUE(test_server()->Start());
     DOMMessageQueue message_queue;
 
     std::string url("files/gpu/");
     GURL full_url = test_server()->GetURL(url.append(filename));
     NavigateToURL(shell(), full_url);
 
     if (wait) {
       std::string result_string;
       ASSERT_TRUE(message_queue.WaitForMessage(&result_string));
@@ skipping 50 matching lines @@
 #define MANUAL_TestGpuWithVideo DISABLED_TestGpuWithVideo
 #endif
 
 // Verify that gpu process is started when viewing video.
 IN_PROC_BROWSER_TEST_F(GpuFunctionalTest,
                        MANUAL_TestGpuWithVideo) {
   VerifyGPUProcessOnPage("functional_video.html", true);
 }
 
 } // namespace content