Move the unit tests files side-by-side with the corresponding .cc files.

components/update_client/url_request_post_interceptor.h

 // Copyright 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.
 
-#ifndef COMPONENTS_UPDATE_CLIENT_TEST_URL_REQUEST_POST_INTERCEPTOR_H_
-#define COMPONENTS_UPDATE_CLIENT_TEST_URL_REQUEST_POST_INTERCEPTOR_H_
+#ifndef COMPONENTS_UPDATE_CLIENT_URL_REQUEST_POST_INTERCEPTOR_H_
+#define COMPONENTS_UPDATE_CLIENT_URL_REQUEST_POST_INTERCEPTOR_H_
 
 #include <stdint.h>
 #include <map>
 #include <queue>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 138 matching lines @@
   bool Match(const std::string& actual) const override;
 
  private:
   const std::string expected_;
 
   DISALLOW_COPY_AND_ASSIGN(PartialMatch);
 };
 
 }  // namespace update_client
 
-#endif  // COMPONENTS_UPDATE_CLIENT_TEST_URL_REQUEST_POST_INTERCEPTOR_H_
+#endif  // COMPONENTS_UPDATE_CLIENT_URL_REQUEST_POST_INTERCEPTOR_H_