Use a direct include of the message_loop header in content/, part 1.

content/browser/loader/resource_loader_unittest.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 "content/browser/loader/resource_loader.h"
 
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/loader/resource_loader_delegate.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/test/mock_resource_context.h"
 #include "content/test/test_content_browser_client.h"
 #include "net/cert/x509_certificate.h"
 #include "net/ssl/client_cert_store.h"
 #include "net/ssl/ssl_cert_request_info.h"
 #include "net/url_request/url_request.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 228 matching lines @@
   EXPECT_EQ(dummy_authority, raw_ptr_to_store->requested_authorities());
 
   // Check if the retrieved certificates were passed to the content browser
   // client.
   EXPECT_EQ(1, test_client.call_count());
   EXPECT_EQ(dummy_certs, test_client.passed_certs());
 }
 #endif  // !defined(OPENSSL)
 
 }  // namespace content