Fixes the cache lock issue.

net/url_request/url_request_unittest.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 <memory>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "build/build_config.h"
@@ skipping 3558 matching lines @@
     std::unique_ptr<URLRequest> r(
         default_context_.CreateRequest(redirect_url, DEFAULT_PRIORITY, &d));
     r->Start();
     EXPECT_TRUE(r->is_pending());
 
     base::RunLoop().Run();
 
     EXPECT_EQ(OK, d.request_status());
 
     HttpRequestHeaders headers;
+    EXPECT_TRUE(r->GetFullRequestHeaders(&headers));
     std::string token_binding_header, token_binding_message;
-    EXPECT_TRUE(r->GetFullRequestHeaders(&headers));
     EXPECT_TRUE(headers.GetHeader(HttpRequestHeaders::kTokenBinding,
                                   &token_binding_header));
     EXPECT_TRUE(base::Base64UrlDecode(
         token_binding_header, base::Base64UrlDecodePolicy::DISALLOW_PADDING,
         &token_binding_message));
     std::vector<TokenBinding> token_bindings;
     ASSERT_TRUE(
         ParseTokenBindingMessage(token_binding_message, &token_bindings));
     ASSERT_EQ(1ull, token_bindings.size());
 
@@ skipping 7136 matching lines @@
   AddTestInterceptor()->set_main_intercept_job(std::move(job));
 
   req->Start();
   req->Cancel();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(ERR_ABORTED, d.request_status());
   EXPECT_EQ(0, d.received_redirect_count());
 }
 
 }  // namespace net