Headless: Pass devtools request id to the URLFetcher

headless/public/util/generic_url_request_job_test.cc

Index: headless/public/util/generic_url_request_job_test.cc
diff --git a/headless/public/util/generic_url_request_job_test.cc b/headless/public/util/generic_url_request_job_test.cc
index 79dc9e2bf5203ddfdff0f7bb25d6b745af8dbc1f..02e52cc082187e1b5f8bb08d8e04df252b3c4f61 100644
--- a/headless/public/util/generic_url_request_job_test.cc
+++ b/headless/public/util/generic_url_request_job_test.cc
@@ -55,6 +55,7 @@ class MockFetcher : public URLFetcher {
   void StartFetch(const GURL& url,
                   const std::string& method,
                   const net::HttpRequestHeaders& request_headers,
+                  const std::string& devtools_request_id,
                   ResultListener* result_listener) override {
     // Record the request.
     fetch_request_->SetString("url", url.spec());