Merge \"Fix clang-tidy performance warnings in metricsd/uploader.\"

#include <brillo/http/http_utils.h>

#include <brillo/mime_utils.h>

HttpSender::HttpSender(const std::string server_url)

HttpSender::HttpSender(const std::string& server_url)

    : server_url_(server_url) {}

bool HttpSender::Send(const std::string& content,

// Sender implemented using http_utils from libbrillo

class HttpSender : public Sender {

 public:

  explicit HttpSender(std::string server_url);

  explicit HttpSender(const std::string& server_url);

  ~HttpSender() override = default;

  // Sends |content| whose SHA1 hash is |hash| to server_url with a synchronous

  // POST request to server_url.